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MY REBUILT KOHLER COMMAND ENGINE HAS TURNED INTO A HEAD SCRATCHER! FUEL PUMP BYPASS TO GRAVITY FED!

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MY REBUILT KOHLER COMMAND ENGINE HAS TURNED INTO A HEAD SCRATCHER! FUEL PUMP BYPASS TO GRAVITY FED!
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Опубликовано:

24 авг 2024

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Комментарии : 127

@Lilasvlogsqaud Месяц назад

This is most definitely a fuel starvation issue. Once you start the mower, put it at full throttle and take some ether or brake clean and spray it into the carburetor and if it revs up and runs like it should, that 100% tells you its a fuel issue.

@dougseaman8791 Месяц назад

You ran that new carb connected to the crappy fuel tank. Take the carb apart and clean the emulsion tube and pilot jet (idle). Also, there may be a screen in the fuel inlet that could be plugged up with the crap from the fuel tank. Remove the bowl and see how fast fuel is coming from the tank. In any event I would remove the fuel tank and clean it out and replace all fuel lines from the tank to the carb.. Also, make sure the fuel tanks are venting.

@MowersNBlowers Месяц назад

You’re onto something dougie

@knighthawk86855 Месяц назад

I agree.

@mrk9295 Месяц назад

I also agree, id start with that and a coil. If that doesn't work I'd check the valves/head gasket.

@Lilasvlogsqaud Месяц назад

@@mrk9295loading the parts cannon and firing a coil at it instead of just diagnosing the actual problem is bad practice because it can potentially add another issue/variable especially with the poor quality parts these days.

@JohnnieBravo1 Месяц назад

Henry, it sounds to me like fueling. You can start it, and when it starts to fail, shoot carb cleaner into the intake and see if it revs up. One other thing, if the lifters are hydraulic, I wonder if one (or both) of them may be collapsing, or there is not enough oil pressure to keep them pressurized. I'd remove the valve cover and see if one or both valves stop opening and closing. You'll get it!

@Lilasvlogsqaud Месяц назад

Good advice

@Dorado1997 Месяц назад

Great video, no repair suggestions. Just FYI I was browsing Craigslist. I saw a replacement 19 HP Briggs & Stratton engine listed for $749. You have a long way to go before you hit the “cheaper to buy a new one” thresh hold.

@MowersNBlowers Месяц назад

I never buy anything! It’s free or it’s not for me

@Dorado1997 Месяц назад

@@MowersNBlowers I like your policy😆

@gordonwilloughby8793 Месяц назад

After all the junk from the gas tank the carb could be plugged. Also check to see if the key in the flywheel sheared. Valves might be leaking causing low compression. To me it sounded like the compression was low.

@TheBattman7772 Месяц назад

Could be a coil overheating issue I ran into that one time on the very same engine and I replaced the coil with another used one and no more sputtering and dying out under load. Good luck on your adventures

@MowersNBlowers Месяц назад

Thanks bro

@junkaholic95 Месяц назад

I'm thinking there was either crud in the tank or bits of old fuel line that got past the fuel filter and sucked into the carburetor.

@antagonizerr 25 дней назад

Man, I see this once a week. Fuel lines DEGRADE. They break down and dump fragments into your fuel system. Just replace them dude.

@michaeljo-anne7123 Месяц назад

I believe strongly it's losing compression due to the broken part in the cylinder wall

@MowersNBlowers Месяц назад

Excellent observation, I also thought it was a possibility of the cause, however as in previous episodes the ring wear pattern on the bore showed that the rings were at least 2” from the area of damage. The rings never come close to the damaged area. And being that the video was uploaded about a month ago, I can tell you that it’s not the compression.

@SamSmallEngineShed Месяц назад

I agree that it’s a fuel/carb issue. I had to replace my fuel line all the way to tank and it helped so much. Different engine etc than yours but I suspect that fuel line was a contributor and now you likely have junk in the carb from the dirty fuel line / tank that were on machine.

@EllisMowersandmore Месяц назад

I'm interested in finding out what it was! As it was running good and then it wasn't and the sediment in the bowl, I'm wondering if junk got caught between the carb inlet and the needle and seat not causing the gas to flow into the bowl fast enough. The longer it sits, the longer it runs.

@MowersNBlowers Месяц назад

Yes, the debris accumulated in the new hipa carb

@thomasroche164 Месяц назад

Maybe the jets are clogged in the carburetor. There was debrisss in the bowl. Try cleaning the whole carburetor.?? Im also thinking look.up the part numbers for the cams for each machine and see if they match. Lifters/valves might use different cams. Too late(for me- not for you) to count the teeth on the cams and measure them up, but it did originally run and drive for you, so doubting that. You will figure it out dude. Enjoy your channel.

@MowersNBlowers Месяц назад

Thanks for the tip bro, and your viewership! 👍

@gillgetter3004 Месяц назад

Gravity tank isn’t enough fuel, hook your tank to pump. I believe you need new fuel lines and tank cleaned out

@MowersNBlowers Месяц назад

As long as the fuel bowl is full, it’ll run until it’s depleted. There’s more than enough fuel.

@Lilasvlogsqaud Месяц назад

As long as the filter isn’t too restrictive gravity is more than adequate for fuel delivery. Fuel pumps are only necessary on machines where the bottom of the tank is lower than the carburetor.

@elijames3041 Месяц назад

Grate video Henry

@davidharper-c9x Месяц назад

The coil is bad. When it gets hot it quits. Put a coil on it

@MowersNBlowers Месяц назад

Not according to the ohm test

@Shorty4808 Месяц назад

@@MowersNBlowerswas it hot when you measured the ohms? If not heat it with a heat gun to test.

@MowersNBlowers Месяц назад

@@Shorty4808 are you kidding? I almost melted! 96 degrees

@Shorty4808 Месяц назад

@@MowersNBlowers but an engine block gets much hotter than that, doesn’t it?

@davidharper-c9x Месяц назад

The coil is bad. When it gets hot it quits. Put a coil onit

@knighthawk86855 Месяц назад

Bro, make sure your choke is opening, look to see it is fully opening, also check to make sure your govenor is adjust correctly.

@MowersNBlowers Месяц назад

But we rode around the block at full throttle and mowed my lawn

@Lilasvlogsqaud Месяц назад

@@MowersNBlowers the choke can stick on whenever it decides to if it’s the style with the throttle and choke combined.

@f62darkstar Месяц назад

I know you said not to mention something you already did....but just because that carb is new, doesn't mean it is good....I went through 3 new carbs before I got a good one when I restored an old trac drive snow blower a couple years ago....or maybe the decompression valve is not working correctly.??

@MowersNBlowers Месяц назад

You’re onto something in your first part of comment

@ronniereaver2815 Месяц назад

I believe its a head gasket issue. i had one of those Kohler Commands that would start and after about a min when it heats up, the gasket allows enough compression loss, and the engine wont run

@MowersNBlowers Месяц назад

No…..definitely not! Zero signs of a blown gasket.

@Lilasvlogsqaud Месяц назад

@@MowersNBlowers what’s it’s doing is a potential sign of a blown head gasket. I myself think the carb is plugged up but a head gasket can and has caused weird symptoms like your experiencing. Spray carb spray or ether into the carb and if the RPMs pick up you know, your carburetor is plugged. If you have another running engine with a carb that will fit swap them as a test.

@MowersNBlowers Месяц назад

@@Lilasvlogsqaud stay tuned bro

@iceberg2221 Месяц назад

to me its a fuel issue because if u run it at low rpm it run but once u up the rpm it starves for fuel

@MowersNBlowers Месяц назад

Gravity fuel tank directly. Fuel is ample

@iceberg2221 Месяц назад

@MowersNBlowers gravity fed or not the carb is blocked up or something thats just my opinion

@Lilasvlogsqaud Месяц назад

@@MowersNBlowersthe carburetor could be completely filthy and plugged up regardless of gravity or fuel pump type of fuel system

@Andy-nm9dw Месяц назад

I had a similar issue and it was the intake valve. I would pull the valve cover and make sure the push rods and rockers are functioning properly. Mine the rocker stud was loose from the head.

@MowersNBlowers Месяц назад

It’s not the valves

@Andy-nm9dw Месяц назад

@@MowersNBlowers I guess you figured it out??

@MowersNBlowers Месяц назад

@@Andy-nm9dw all My videos are a month ahead

@daltonreed Месяц назад

Maybe you have an exhaust valve that’s getting hung up or a sticky exhaust valve that’s really weird though I haven’t seen anything like that best of luck hopefully you figure it out

@MowersNBlowers Месяц назад

Thanks for the tip

@mjg263 Месяц назад

Try disconnecting the kill wire from the coil, maybe one of the interlocks is screwing things up. Could be a hung up valve / valve seat come loose (I had a valve seat op loose on a Quantum earlier this summer and it sounded just like that).

@MowersNBlowers Месяц назад

Not the kill wire

@scgoralski Месяц назад

I’d be checking the flywheel key, perhaps is cracked just enough to affect your timing?

@MowersNBlowers Месяц назад

Nope

@nicholasbath7703 Месяц назад

Tough one. Could it be the carb needle/float not letting enough fuel in to keep up with the engine?

@MowersNBlowers Месяц назад

It’s a new carb but lots of crap went through from the debris. You’re close

@nicholasbath7703 Месяц назад

@@MowersNBlowers Jets clogged from debris then?

@justincovington4401 Месяц назад

i bet its the carb. i have gotten several brand new carbs that were no good. believe ir or not. brand new and dont work right. even carbs from hipa ive got bad ones. i got a brand new one to put on a kohler courage and it didnt even try to crank. from my experience. but popping could be timing or coil. the compression does seem a little low. but its not low enough to not start up.

@rickbroerman9267 Месяц назад

That is a HEAD scratcher... so I guess you need to try replacing the HEAD... 😅😅😂

@robertkidder4738 Месяц назад

That 15 hp crank may have a shorter stroke that the 16 hp crank, causing low compression.

@MowersNBlowers Месяц назад

But it ran around the block and mowed my lawn

@Lilasvlogsqaud Месяц назад

Most likely the only difference on the 2 motors was the stickers. Briggs has been known to label the same exact engine from 14-17~ hp and I’m certain Kohler has done the same. There was a massive class action lawsuit which is why most engines are rated by their torque rating nowadays. I know some of the twins from 18-22HP~ & 22-25HP~ were also identical except the sticker that was slapped on it. I could be off on the exact HP ranges but it’s close enough until you research your particular engines.

@angelicaconiguliaro3179 Месяц назад

Hey Henry! Hope all is well? I'd go with the valves, one is not seating correctly. Are you able too pull the cover and try too start it too see? We had a backfiring problem on a old rider that was the cause, almost identical symptoms too this one.

@stick5351 Месяц назад

Exhaust valve too tight. Or, junk in the carb jets.

@MowersNBlowers Месяц назад

You’re close

@goofe.washington953 Месяц назад

Bad gas cap?

@MowersNBlowers Месяц назад

No, good guess though

@drewpowellmusic5569 Месяц назад

Have all 3 carbs been new? Maybe a bad casting on this latest one? I had a Craftsman that backfired and popped like crazy, also flooded the intake with gas. Swapped carbs to a new one and it solved my problem. Otherwise, are you getting plenty of gas in the bowl? Kinda seems like it’s just running on what’s in the bowl then dying. Grab some vice grips. Right when it dies, clam the fuel line at the inlet and drop the bowl to see if you have any fuel (before there’s time for the fuel to replenish). I also had a new carb where the float was getting hung up somehow on the bowl inside and once it closed, wasn’t able to drop back down to let more fuel in 🤷🏻‍♂️ Good luck and looking forward to seeing what it is!

@MowersNBlowers Месяц назад

Stay tuned bro

@knighthawk86855 Месяц назад

Is the fuel line being sucked shut?

@MowersNBlowers Месяц назад

Fuels pouring out

@Jim-ie6uf Месяц назад

I’d do a leak down test. It’s a long shot, but maybe there is a small crack in the cylinder where the bottom of it broke off. Try a whole new fuel line

@MowersNBlowers Месяц назад

But it has a temporary gravity fuel tank on it with a new fuel line, it’s not the fuel

@10mmsocket32 Месяц назад

My guess: the ceramic portion of the spark plug (white part) has a hair line crack. Did you try a different plug?

@MowersNBlowers Месяц назад

You saw I did if you watched the video

@10mmsocket32 Месяц назад

@@MowersNBlowers dang it. Must of missed those few seconds.

@MowersNBlowers Месяц назад

@10mmsocket32 hit that notifications 🛎️

@10mmsocket32 Месяц назад

@@MowersNBlowers for what?

@MowersNBlowers Месяц назад

@@10mmsocket32 notification bell? Tells you when my new video comes out so you don’t miss anything, unless you’re skipping

@rogermcdonald1607 Месяц назад

Henry , i know you probably already figured it out, but it still sounds like fuel issues. Were the push rods the same length from both engines? 🤔🎥🇺🇸

@MowersNBlowers Месяц назад

Yes sir! Both rods perfect! And yes, I figured it out. But you’ll all need to wait a few episodes before I get to it…lol

@rogermcdonald1607 Месяц назад

@@MowersNBlowers 10-4

@FaithwalkerTodd Месяц назад

There’s only three things the motor needs to run, fuel air mixture, spark, and compression. The only thing we couldn’t see was compression.

@MowersNBlowers Месяц назад

It wasn’t compression, because we rode around the block at full throttle and mowed my lawn

@FaithwalkerTodd Месяц назад

@@MowersNBlowers Maybe the head gasket has a leak? Maybe the compression release mechanism is malfunctioning in someway? I doubt the rings got stuck inside the piston but that’s a possibility, not likely. And the last thing would be the keyway in the flywheel got sheared. Just coming up with any idea I can imagine. I’m sure you’ll figure it out. ✅👀🍀

@MowersNBlowers Месяц назад

@@FaithwalkerTodd thanks bro! It’s something simple

@gottatinker3363 Месяц назад

i am having the same issue right now. i have tried two different engines and am having the same issue. deleted all safety's, checked valves, compression, engine ground, fuel lines, checked coil and re-gapped, new plug n gapped, inspected engine wire harness, replaced tank. both engines surge, pop and sputter. I have now come to the frusterating conclusion that i received two junk china carbs in a row (rare) so i just ordered two replacement carbs from Hipa. Hopefully this will fix my issue before i throw an engine across the yard!..........smhhhhhh

@MowersNBlowers Месяц назад

It’s probably the carb bro! It’s 90% of issues. If the crank key is slightly sheared, the timing may be slightly off and cause popping. Maybe

@Andy-nm9dw Месяц назад

@@gottatinker3363 check your intake valve. If it is out of spec or the Stud is loose I. The head for that rocker it will run only low RPM.

@MowersNBlowers Месяц назад

@Andy-nm9dw it’s a command with hydraulic lifters, no lash adjustment

@Andy-nm9dw Месяц назад

@@MowersNBlowers bent push rod can do same.

@MowersNBlowers Месяц назад

@Andy-nm9dw not bent

@knighthawk86855 Месяц назад

First again..... LMAO

@mikedach5538 Месяц назад

Your girl friend ,s probably know about engine, s then you do

@MowersNBlowers Месяц назад

Maybe they do and they know more than you!

@mikevessels8236 Месяц назад

You don't put used parts in one an call it rebuilt put new stuff in it don't be a rookie

@MowersNBlowers Месяц назад

So what do you call rebuilding a blown engine to a working one?

@MowersNBlowers Месяц назад

Anyone can buy new parts! You’re missing the point.

@mikevessels8236 Месяц назад

@@MowersNBlowers put new parts in it once and be done then sell it you know it will not come back

@MowersNBlowers Месяц назад

@mikevessels8236 well buying parts is not part of the channels policy. Everything needs to be free.

@johnleppla Месяц назад

could be gas in the oil that wouls cause popping

@MowersNBlowers Месяц назад

Nope

@Lilasvlogsqaud Месяц назад

Can you please elaborate on how fuel in the oil can cause popping?

@gonzorig1 Месяц назад

Check the flywheel key

@MowersNBlowers Месяц назад

It wouldn’t run if it’s sheared

@gonzorig1 Месяц назад

Mine ran just like that and back fired it moved a little bit and would run but would back fire

@MowersNBlowers Месяц назад

@@gonzorig1 this video is a month ago, it wasn’t the key

@tombolin7168 Месяц назад

@@MowersNBlowerswhat was it Henry ? Was the fuel just stale?

@MowersNBlowers Месяц назад

@@tombolin7168 I’m not tellin’

@shangrilaladeda Месяц назад

You have the ring carb on there

@MowersNBlowers Месяц назад

What’s a ring carb?

@shangrilaladeda Месяц назад

@@MowersNBlowers wrong not ring autocorrect strikes again

@MowersNBlowers Месяц назад

@shangrilaladeda no it’s a command or courage carb. Maybe it’s a badly molded one but it is the correct carb

@shangrilaladeda Месяц назад

@@MowersNBlowers I don’t think so, the way they increase horsepower and torque is mostly with the carb and some engine parts some heavy material with some lighter material for more power, same thing with carbs, all engines work the same but the tuning is done with parts no way with their garbage courage parts are anywhere the same quality as the pro variant

@shangrilaladeda Месяц назад

@@MowersNBlowerstry a vacuum test