I Blew Up a Modified Predator 420 Mud Motor

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I Blew Up a Modified Predator 420 Mud Motor
After spending over 2 months building out this powerful 420 Predator mud motor, adding tons of modifications, and making more horsepower I blew the engine! Follow along as we tear down the Predator mud motor and figure out what I broke this time. And as always don't forget to stick around to the end of the video for the bloopers and the hater's corner!
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Опубликовано:

26 июл 2022

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Комментарии : 151

@Jurry623 Год назад

Red beards garage has built some nice predator engines

@SendItJonBoats Год назад

I don't have red beards garage money. I wish I did.

@greenpighunter6930 Год назад

High revving cast parts long enough and somethings gonna break. Plus side is it didn't catch on fire. Be safe. Haters corner is good stuff.

@SendItJonBoats Год назад

I would have thought the cast parts would last longer than 10 minutes LOL. Guess I was wrong!

@thomaswilson9792 Год назад

You’ve got to do a haters corner video!! Just put all of them together if it’s 5 min or 45min your the only person I’ve seen that does it and some of your reply’s are so freakin funny

@SendItJonBoats Год назад

LOL one of these days I will

@hammer9856 Год назад

So sorry your motor blew up after all that work. But I know you will build it back stronger and faster. Looking forward to seeing the new and improved version on the water when you get it done.

@SendItJonBoats Год назад

Thanks bud, can't wait to get it back together because it was a crazy strong build!

@Kevin-ve2ck Год назад

He built it with the build back better plan 😂

@SendItJonBoats Год назад

@@Kevin-ve2ck Now thats funny right there! Lets go Brandon!

@Kevin-ve2ck Год назад

Not sure where we are going but let’s go

@adwhite804 Год назад

I dig the "engine- nuity" with the Predator... Now.... Use a Ghost! Basically a race motor Honda clone for go karts...but! Not sure they are 400+ on size...but seems to be pretty badass! I just luv the whole boat you got going on here. Good stuff

@SendItJonBoats Год назад

I have not tried the ghost yet. I need to jump on that.

@adwhite804 Год назад

@@SendItJonBoats lol... HOLD on, it's my understanding they got some juice. And a bit torquey. Enjoy, good luck if you grab a ghost and go for it sir

@nathanmahler3743 Год назад

Billet crank, rod and flywheel!

@SendItJonBoats Год назад

THem billet parts start adding up quick. I think just a billet rod and keep the rpms under 6k for now will be fine.

@ferddoes1498 Год назад

yea get it girl!

@SendItJonBoats Год назад

Yee Yee!!!

@Murphyslawfarm Год назад

G'day great video mate and great scooters in this video lol. Sucks about the mud motor but you can make it better.

@SendItJonBoats Год назад

Thanks bud. I will rebuild it and make it better.

@FL.AirBoater Год назад

Where did you purchase that exhaust muffler for your predator 420 ? Love your videos, Keep up the great work!

@genekind8752 Год назад

A number of things could have happened with the rod and crank. The most likely is an improperly installed bolt. It could have also had a poorly ground crank or debris stuck in bearing, starting a chain reaction. Getting your RPMs up to 6k might have been a contributing factor but it definitely wasn't the cause. Thanks for the video, glad to see I'm not the only one who has motors trying to spontaneously eat themselves.

@joshuadenton4781 Год назад

You should do an airboat build.

@SendItJonBoats Год назад

Dude I want to so badly! I got an idea for one and I will make a video series on it at some point.

@nickbarrickman8005 Год назад

Love the vids! Always have wondered, are you a duck hunter? Would love to see a blind build and set up video.

@SendItJonBoats Год назад

Thanks for watching. Yes I duck hunt when I can, lately been too busy with boats to hunt much. I think we are going to start working on a DIY duck blind kit soon, as well as some other products.

@SouthernCountryboy10 Год назад

To the scooter talking about 9.5 hp outboards. They were only made late 60's- early 70's. Also 9.5s are great little motors, loved mine when it ran good.

@SendItJonBoats Год назад

Good to know... I thought I was going crazy for a minute, but now I know 9.5's were a real thing. I had never even heard of them,

@user-gt3xx6lc1o 4 месяца назад

Most say don't loctite rod bolts but with stock rod I do. Check torque on any new engine

@brodericklancaster7237 Год назад

Use studs instead of bolts on the crank bearings, you can get more stretch out of stud, if you have the clearance.

@SendItJonBoats Год назад

I think studs are going to be a must have on all my builds now

@thehulkamaniabrother2.089 Год назад

Are you saying to use studs and tighten them up more? How much ft. Lbs.?

@anthonykropp2641 4 месяца назад

Where do you buy all of your upgrade parts from

@FL.AirBoater Год назад

Where can I purchase a exhaust pipe like that one for my 420? Thanks brother

@trkyhntr8685 Год назад

You will build it back better, you kill me with the haters corner! 😅

@SendItJonBoats Год назад

Yeah man, hope I can get it back running soon!

@trkyhntr8685 Год назад

@@SendItJonBoats No doubt that you will!

@johnalbrecht7850 Год назад

Please review the Predator 459 and are there any mods I can get. Awesome channel 👍

@SendItJonBoats Год назад

I will do that when I get one in

@billbalke7572 8 месяцев назад

So you said it took you 2.5 months to build this ... looks pretty stock to me so what exactly did you do ? The only thing I noticed that isn't stock is the exhaust , carb setup and roller rockers ...

@SurvivalHunterNM Год назад

That shaft is fine. You're seeing bearing transfer. Just sand it, polish it, and you'll be fine. The problem was that the bolt wasn't tightened down.

@SendItJonBoats Год назад

Really??? Oh man that is good to hear, I was freaking out trying to find a crank and they are almost as much as a new motor!

@tomjones7853 Год назад

Do not sand a crank. You can reuse it but dont sand it.

@SurvivalHunterNM Год назад

Actually, I've used this method on several engines. It works great. The trick is to focus on the residue and since it comes off quickly, you end up with very little impact to the crank.

@kensperspective Год назад

No! That crank has been overheated. That has ruined the heat treat on the metal and made it much softer. If you try to run it at high rpm’s it will fail. You need to replace it.

@user-pc7pc8yb3n 9 месяцев назад

Muriatic Acid, Acid Brush and a little time to remove that aluminum from the steel crank! Rinse and then some Crocus Cloth to polish the crank pin.

@MrMiller123 Год назад

In a totally unrelated topic? Does your light bars make that front brush guard hot? Or do they have enough airflow to keep them cool?

@SendItJonBoats Год назад

Mine stay pretty cool, but I do not run them for long periods of time, just long enough to get where I am going and that's about it.

@gjohnston281 5 месяцев назад

Maybe this is a heads up moment, if you are building a high performance motor a person should go back and check all the factory torque specks just in case it was a Monday or Friday built motor . ???

@davidgood1699 Год назад

I have a question about the size of motor to use I live in ohio and alot of the lakes in my area are all 9.9 so you think a 6.5 would be ok on a 16 foot jon boat I want to duck hunt out of it not worried about speed can't get to the back water with regular motor thank you for any information just found your channel great videos!!!!

@SendItJonBoats Год назад

a 6.5 will push it, not fast at all but it will push your boat. I have done it on my 16ft boat

@tuyo_adventures.2185 8 месяцев назад

Did you fix it?

@buyembreakem5996 Год назад

Hey man, I just built a 22hp beaver dam longtail and I’m having an issue with the prop hopping out of the water and having to really wear myself out holding in. I went to the 8.5 prop and it was better but I have sacrificed a lot of speed with it. I’m looking for recommendations on how to keep it down so it rides in the water. I’ve used the trim tabs that are included but it’s not helping much. I bent the skeg and that seemed to help some. What should I try next I’d really like to use the 9 inch Because it pushed me at a good speed.

@SendItJonBoats Год назад

Transom could be too tall, which is the most common issue I see. 16 inches or less is the sweet spot. Also you can try loosening the shaft bolts and rotating the entire shaft in the direction you bent the skeg, that usually helps me. Also adjust the motor it sits as far back as possible so all the weight is on the tail. Try all of that and if it does not help then shoot me an email chris@tbnoutdoors.net

@charlesjones257 Год назад

stroker crank!

@SendItJonBoats Год назад

I wish! Them things are so expensive!

@xRamRacing Год назад

For a break in I would use some cheap conventional and a zinc modifier. Royal purple isn't good from what I've heard especially on small engines. I've always heard on these predators you shouldn't ever run synthetic for break in.

@SendItJonBoats Год назад

This one was already broke in with cheap conventional oil last year. Had about 3 or 4 hours on it.

@luuk-out-below9804 Год назад

Welp you sure let the smoke out of that one!! Chit happens. It could have been doomed from the beginning as in you got a defective one or maybe it couldn't take the higher revs by design. Just curious if you do any kind of break in when you do a motor like this or just giv'er from the start? Looking forward to seeing chapter 2 on this one!

@SendItJonBoats Год назад

I usually break them in by running them on a longtail without any mods. Regular governor at 3800rpms max and just run it like normal. This is one of the engines we used for the 3 way review video so it had about 2 hours of run time on it.

@NN1Ckl. Год назад

@@SendItJonBoats Please keep in mind to do a small re-break-in cycle after internal mods(with the exception of governor removal) lol Only saying cause I’m seeing a bunch of channels skip break-in cycles and blowing stuff up lol

@SendItJonBoats Год назад

@@NN1Ckl. YEs for sure will do a break in. I left the governor in this one for a reason, I am still thinking the bolt just wasnt tight enough

@NN1Ckl. Год назад

@@SendItJonBoats I’m having to agree with ya on that. Idr if you did it or not, but swap the flywheel for a billet aluminum one once you remove the governor there Bossman. I’ve grenaded a few stock flywheels over 5k 😂

@NastyNate-fn6od Год назад

Hey bro, #haters corner Hey scooter I Need your advice, if I put a mud motor surface drive kit on my job boat, can I use it in fresh water and salt water? Or are they only made for trash water? Also still waiting for that surface drive kit video lol 😂 love the videos man!

@SendItJonBoats Год назад

They will be okay in salt, just rinse with fresh water after you use it for sure.

@goodboyringo9716 Год назад

Buy a new crank and a ARC billet rod, install a billet flywheel. Remove the governor and tap & plug the holes. Never over rev a predator engine without an ARC rod. Never remove the governor without a billet rod . The rod was the problem.

@denny2277 Год назад

What kind of exhaust pipe and muffler is that?

@SendItJonBoats Год назад

It is a Beaver Dam Mud Runner exhaust. They sell them on their website.

@NastyNate-fn6od Год назад

“Haters corner” Hey scooter When are you going to post part 2 of the homemade mud motor surface drive video that you started 7 months ago and never finished? Ps: love the videos man!

@SendItJonBoats Год назад

Still working on it dude, the shop has been a little bit on the crazy side and I have not had time to mess with it. It will be coming up soon though

@NastyNate-fn6od Год назад

@@SendItJonBoats yeah I figured y’all were busy as hell, thanks for all the great videos and info. Really helped me with my build!

@SendItJonBoats Год назад

@@NastyNate-fn6od Busy is an understatement! It has been nuts. I am slowly getting back to filming, might take a while but I will get all these projects knocked out eventually.

@NastyNate-fn6od Год назад

@@SendItJonBoats hell yeah man, looking forward to the upcoming videos. Seriously helped me with my build

@cameronbragg3612 Год назад

Check out red beards garage he builds these small motors up all the time lots of good information on his RU-vid channel brother

@SendItJonBoats Год назад

Been watching him for years... but I don't have his deep pockets or sponsors willing to give me bookoos of money and parts.

@cameronbragg3612 Год назад

@@SendItJonBoats me to brother I just buy one part at a time lol

@aleemrahim6846 Год назад

Best boat size for 420cc?

@SendItJonBoats Год назад

1436 up to a 1748.

@kipmyers5897 Год назад

I don't know if that's a stock rod or not but I can tell you I ran five hp flat head Briggs tiller engines that were modified to rev to 9k at 28 hp back in the 80s ...We ran a billet rod made by Horseman ...for Kart racing ....they called there rod unbreakable ....As we no nothing is ever Un breakable or Unsinkable but they are tough ....When you build another clearance the bottom end loose as if it's half worn out ....it will free it up alot and the rod company I mentioned comes with a rod bearing similar to a small block Chevy rod bearing....We also ran a two stroke oil in the crankcase on our in our four stroke crankcase ....The reason we did was it gets very watery when hot and less drag on bottom end yet lubrication is still good but we did change the oil every 15 laps ...On a mud motor I don't think I would do that but I would change whatever oil you use after each time your in the water ..,..As always good video !! Good luck .....see about a billet rod they are three times more thick and last ...you may have to grind the block in one spot so the big rod has clearance ....it's hard to say bc I've not built a predator motor..

@SendItJonBoats Год назад

i will for sure be going to a billet rod after this. They make them for the predators.

@kipmyers5897 Год назад

@@SendItJonBoats Send me a link to your other videos don't you do some type of paintings and coatings? I would like to check them out .....I may love Jon boats but currently carving a rock for a bathroom sink lol....So would love to check out your other stuff that like me funds the ole Jon boats ....keep up the great videos s....love em...!!!!!!!!

@matthewbates813 Год назад

Hard on them rods are ya?

@SendItJonBoats Год назад

TOo much friction on the rod... may need more lube!

@gradyfuller4880 Год назад

Hit up Red Beard’s Garage or Cars and Cameras. They build predators all the time.

@SendItJonBoats Год назад

Those guys get flooded with emails and messages, they would never respond to me. I am just a little speck in the youtube world.

@gradyfuller4880 Год назад

@@SendItJonBoats he is building a John boat with his son with a mud motor now. So he might be very interested in your knowledge.

@nickb8618 Год назад

Over rev for factory rods

@SendItJonBoats Год назад

Yup, I'm an idiot.

@Threads1220 9 месяцев назад

Hey my man you really don't wanna run royal purple in these engines I've blown up 2 pretty expensive 212s because of royal purple and a few other friends have had similar problems from running royal purple.

@SendItJonBoats 9 месяцев назад

Im glad you said something, I have been reading some forums with people complaining about royal purple, and I wasn't sure if I should believe it or not... but you convinced me! Thanks

@Threads1220 9 месяцев назад

Just trying to spread the word

@adwhite804 Год назад

After further review . I shall recant. 200-212-2whatever.. definitely not big enough...

@SendItJonBoats Год назад

Yeah I got to stay with the big block stuff for this build. I am doing something really stupid for an upcoming video.

@adwhite804 Год назад

@@SendItJonBoats wow...really stupid huh...

@cozziwysong3905 Год назад

good job scooter you blew it up hahahahahahahaha

@SendItJonBoats Год назад

Yeah that one is gone

@erikrohleen339 Год назад

After all that work you don’t buy a forged rod? Can’t even fathom. Thats like spinning a small block to 8-9k. You need to think things through

@kensperspective Год назад

This is why you have to replace the connecting rod to run at high rpm’s. Put in a billet rod and billet flywheel. If the flywheel fails we won’t get the chance to comment on a video because you’ll be dead.

@daleley7645 Год назад

Sorry about the motor, but hopping up a Chinese motor is kinda like putting nitrous on a Yugo. It'll work for a while.

@SendItJonBoats Год назад

Anything will work once! LOL. Thats what send it is for... I do dumb stuff so you dont have to wonder.

@clayton203 Год назад

Took my stock 670 running wide open with 8x5 prop was turning 4 to 4100 rpm, Somewhere in the 17 18 mph range Put a 8x6 prop wide open turning 3600rpms, 20 to 21 in lake water little chop, I feel a lot better about it Not a fan of overreving a lawnmower engine

@SendItJonBoats Год назад

I had never had any issues until this. I have yet to own a mud motor that I did not spin at least 4800 rpms. Then this happened so I am re-evaluating my life choices lol

@clayton203 Год назад

@@SendItJonBoats lol, don’t you have a 670 rig, I thought you had one, or did you blow that one up too,, lol Anywho, I think I had told you that I had the old 57 inch crawdad frame godevil which I mounted the 670 on, with a heavy alweld 1542, and I am getting those speeds, with a long kit from sps I would probably get close to 30 with the rite prop,but the speed I’m getting is good enough until this frame gives up, and I figure I got it dialed in rite, cause I can sit down and pretty much steer and control it like an outboard, which makes it cheesy

@SendItJonBoats Год назад

@@clayton203 Yeah i still got the 670... I was doing this for a special project. Still going to do it, I got 2 other 420's to play with.

@clayton203 Год назад

@@SendItJonBoats I gotcha, what about the big v twin, man you need to put a longtail shaft on that thing, I bet it will rock, Me personally I will never go back to a regular outboard, way overpriced, and they won’t suck mud for cooling, keep strokn dude, I like watching your vids,,a lot of funny stuff, 👍🏻

@jeffsidwell2215 Год назад

Rebuild it and send it.

@SendItJonBoats Год назад

Yee Yee... thats the plan. We shall see what happens.

@romiedavis6031 Год назад

looking like no oil pressure

@vafaceless385 Год назад

Shit happens. Check out Go Power Sports for parts to rebuild it. Also check out Red Beard's Garage on RU-vid. He builds these motors from mild to wild. Can't wait to see what you do with it.

@SendItJonBoats Год назад

I have seen Red Beards, followed him for years. I doubt he would even talk to me being that he is a much bigger youtuber than I am.

@swampcritterisbackbaby1740 Год назад

@@SendItJonBoats Dude, he just put a mud motor together for a buddy of his. I bet he would point you to the best parts.

@SendItJonBoats Год назад

@@swampcritterisbackbaby1740 I cant afford the parts he uses, because I am not sponsored by any of these art companies. He gets mega bucks in parts to build those motors. Send it is all self funded and we broke!!!

@nathanbillingsley42 Год назад

I say throw a ls on it. It will move 😁

@SendItJonBoats Год назад

Everyone wants to put an LS on anything... of course LOL

@nathanbillingsley42 Год назад

@@SendItJonBoats I had another idea...... chainsaw maybe a paddle wheel setup...... I also had to order a "RU-vid master boat builder" shirt. And for once shipping didn't equal the same as the shirt. So thank you for that.

@SendItJonBoats Год назад

@@nathanbillingsley42 Ohhh a paddel wheel set up would be cool on a small boat! I love those shirts dude, I got 2 and wear them all the time.

@mikelgeren149 Год назад

Cast rods , cast piston will not take high revs . Old time wrench from the 60s and 70s . Most every high performance engine will blow eventually 🤣. Watch high revving without a load . 👍

@SendItJonBoats Год назад

Funny that I ran 5k rpms for years on all my mud motors and never had an issue.... 6k rpms is apparently the limit. LOL

@Kevin-ve2ck Год назад

Come on man. Everybody knows you have to put KY in the oil of those motors to get proper lubrication. Or use those scooter tears cause their use to being screwed 🤷‍♂️🇺🇸🎣

@SendItJonBoats Год назад

mannnnnn why did I not think to add KY and scooter tears!!!! Good thinking!

@Kevin-ve2ck Год назад

@@SendItJonBoats it’s the perfect lubricant for friction. You could probably get 7000 rpm’s out of it

@SendItJonBoats Год назад

@@Kevin-ve2ck LMAO

@Kevin-ve2ck Год назад

I thought you was a certified RU-vid builder but your cheap ass buys Harbor Freight tools. Good job scooter

@robertdunn4145 Год назад

Engine was revving too high and it sound like sound like the somebody did not tighten down that boat to spec need to talk to Chang boss is at the factory he's going to be in deep mushu

@SendItJonBoats Год назад

LoL... is mushu the chinese word for deep doo doo? LMAO... I think it either rattled loose from the high rpms or it wasn't tight

@chrisdaniel1339 Год назад

Should have used a Honda GX390 instead of that Chinese junk. YT Channel Project Farm did a significant oil test series and the two finalist were Pennzoil synthetic and Amsoil synthetic maybe try one of those oils instead of royal purple, empirical testing always beats advertising

@SendItJonBoats Год назад

When youtube starts paying me enough to afford a honda I will use honda. I am not paid by royal purple, would be nice but that's what I have always used and never had any issues until now. I will try amsoil next time.

@user-gt3xx6lc1o 4 месяца назад

" tons of mods " should have included a rod

@thehulkamaniabrother2.089 Год назад

Why is the governor still in there lol?? 😂

@allenwalters8812 Год назад

If your rod wasn't so short you could have actually knocked the bottom out of it.

@SendItJonBoats Год назад

LMAO, it seems like I have heard that before. LOL

@jl4093 Год назад

At this point, EVERYONE should see the difference between Chinese version and original Japanese HONDA. As much money he dumped on it, could've gotten the real deal. If I've learned anything in my life, the Japanese know their metals, and engines. Honda in particular. Performance from factory vastly better than Chinese versions and definitely more dependable.

@thenhoutdoorsman4612 Год назад

Could’ve bought a Honda for 4 times the price and wouldn’t make the same hp as a built predator

@SendItJonBoats Год назад

Oh I know Honda is better quality than anything out there.... but I don't have Honda money.... I got harbor freight money.

@jl4093 Год назад

@@SendItJonBoats I feel it man. I only got that scrap yard picking and rebuild a little at a time money. 😂

@jl4093 Год назад

@@thenhoutdoorsman4612 only if you trust the number on the motor. Honda has way more power than a China of the same "hp". Plus it would still be running. It's an expensive anchor if it doesn't.

@davidklug6980 Год назад

At this point slap a stroker crank (if there is one) in it and call it good. 😅

@SendItJonBoats Год назад

They do have a stroker crank but its stupid expensive... like 500 bucks.

@ryandesselle5457 Год назад

I know what happened, motor went bye bye.

@SendItJonBoats Год назад

Oh she gone for sure!

@Kevin-ve2ck Год назад

You sent it a little to hard ehh

@SendItJonBoats Год назад

Just a little! LOL

@nickwilliamsoutdoors Год назад

Modding a Chinese engine that's competing on cost and putting it on a boat makes no sense. If your go-kart breaks, you can drive home. If your duck boat breaks out on the marsh, you're in for a fun time. Tinkering is fun, but on a boat if you want more power, buy a bigger motor.

@SendItJonBoats Год назад

That is not the point of this channel... we build stuff and see if it breaks. If I wanted to be safe I wouldn't have named it Safety Jon Boats instead of Send It.

@nickwilliamsoutdoors Год назад

@@SendItJonBoats break away then

@gregmoyers7757 Год назад

Hmm, ya add bolt on mods yet run stock lower end. And rev it up to almost twice the max rpm. Not too swift in the old brain are you Scooter? Why would a 3600 rpm motor turn 6000 rpm? Do you think it is a conspiracy against you? They sell you a high performance motor dirt cheap and lied to you about it capabilities? Nope, they told you the truth, come on Skippy, it does not even have rod bearings. I am coming over and removing the rod bearings from your poser pickup because real motors don't use sissy ass rod bearings. All joking aside. It needs rod bearings and get rid of stock flywheel. It is balanced for max 3600 rpm. I have seen more than one fly apart at 4000+ rpm. Hey it is a lawn mower and pressure washer engine. Just sits there and runs at a steady rpm well below max speed.

@SendItJonBoats Год назад

Yeah Yeah I know.... lesson learned.