Thanks for the video. I picked up this exact motor this summer. It is hard to start and will not restart when hot. There have been many issues that I have found and fixed. Dirty and corroded grounds, coils missing ground jumper wire, emergency stop switch wires rubbed through causing a short to ground, and the stop switch on the tiller handle was defective. It still does not want to start. One plug is fouled, both have spark. The carb leaks fuel when choke is on and you turn it over. The carb was supposedly rebuilt and the engine was "inspected" this spring right before I bought it. I hope both cylinders have compression. This video has been beyond helpful, thank you.
It's probably the bowl seal. I found the one that came with my kit was too thin and it would still leak. I made a new one from silicon and posted a video on how to.
I know this is an older posting but i had never had the carb off my motor so I went to RU-vid for help , and wow great video sir made the job so simple . I too couldn’t get the main jet out of the bowl it was as if it was galled in there , one other note , mine did have a gasket between the carb and head . Thanks a lot for the great video , saved me some money
Thanks for the video 👍🏻 Carb is the same on my 95’ Mercury 25 hp. the only thing I had to do different is remove the starter to remove the inside carb mounting nut. I purchased a rebuild kit first $20 ( gaskets, plunger ect. ) followed your video on disassemble and cleaning, the issue was the float was full of fuel, purchased a new float $11 re assembled and BAM RUNS LIKE A MERCURY SHOULD 👍🏻🇺🇸
@@CrappieCrushinTv I also found out the main jet in the bottom of fuel bowl (the one you were not sure of an adjustment ) is fixed and has no adjustment so it can be backed out , cleaned and just snugged back in 👍🏻
great video! i bought a older boat from a fella had a 1999 9.9m on it did the same thing as this.i followed your video and now, mine is running like a top! thanks
I just did this on my 1999 20 hp Mercury, after watching the video I decided to check mine. This all stated with hard starts and then eventually no start. I found the ignition system to be finally dying. After all the repairs it still had carb issues also, the primer was stuck and wouldn’t depress when pulling the primer knob. Also I removed all the cover plates and bowl cleaned all the internal passages. I found your video very helpful the engines although different horse power they are identically built. Only issue after that was the switch box wiring was a shot in the dark for firing order. I missed it. Once that was correct it starts first pull now every time. Hope this helps others along with your help on the repair. Thanks
Thanks for the informative carburetor video. Ironically I just took apart my 6 HP mercury Carburetor. Before I cleaned it and put it back together, wanted to make sure I was doing it right. LOL I don’t know if my issue was carburetor or not, so doing a process of illumination. Thanks!
I have the same motor as a kicker on my boat. When placing the idle adjustment screw back into the carb, what I did was mounted the carb loosely and then placed the "C" part that goes on the adjustment knob together, placed it thru the hole in the cowling. There was no amount of pushing needed to get it to go as Crappie says. Once that was in, go the the left side of the motor (when you are behind the prop), press down the lever Crappie tells you when he is installing the knob. You will see how those two parts clip together, it is pretty obvious. This might help you. Awesome video!
Thanks for the very helpful video! I just picked up a 9.9 and first day on the water it started bogging down at WOT and eventually would barely idle. Upon checking out the motor, I noticed the previous owner removed the fuel filter from it's housing, and I'm betting my carb is full of shit. This certainly comes in handy since I have never worked on a carb motor at all, nevermind a 2 stroke.
@@CrappieCrushinTv thanks man, my motor is exactly the same as yours and I just rebuilt the carb today, she runs beautifully again. Your video helped a ton. You weren't kidding when you said putting the idle speed switch back in is a beast... Holy! It took me ten good minutes of cursing and scratching my head.
@@Adam-en4zm LOL yeah that enrichment knob can get you LOL.... Anyway I'm glad you got her purring. Enjoy the ride now. I rip mine down every spring and do a good cleaning so this way there are no mid season hang-ups !!!!!!!
@@CrappieCrushinTv That's a smart call, I just picked this motor up and the previous owner had performed the genius fuel filter delete mod. No wonder the carb jammed up my first day out, haha! Gonna be sure to de-gunk it at the tail end of ever season, plus I even got it a fuel filter, lol!
yes, possible all merc carbs have this. Mine had the ball stuck up inside the spring!!! I think some tard tried rebuilding it before I got my hands on her. I mean, how does the ball get stuck 5mm up into the spring anyway?
Thx for video. I got the same motor. Is there suppose to be a gasket between the carb and the engine block? My carb rebuild kit comes with a gasket. The Mere Parts diagram also shows a gasket. Mine didn't have a gasket from previous owner. Perhaps that's why the motor ran funny. In your video, I didn't see a gasket either. The mating face on the engine block side has like a rubber seal around the openings. Any help would be great.
just did one of these you could have left all the plastics on the motor and just removed the 2 small bolts my motor was sunk so i was draining water good job
Thank you so much for this video!!!! I’m a boater and enjoy learning about motors since I’m out on the water a lot! I can’t find a serial number for this new to me merc but it’s a 9.9 2 stroke and carb looks exactly like yours with fuel enrichment and all. I rebuilt my carburetor (it had some water and jelly like stuff in there) and still can’t get it running right. It starts if I spray a gas/oil mix directly into carb but idles way too high and then stalls unless I manually open the Choke butterfly. I’m ready to break down and buy a new carb. Any advice??? Would’ve bought a new carb instead of rebuild kit if I had opened carb first!
I'm assuming you recently aquired this engine and problems to go with it. The jelly you speak of is usually caused by running fuel containing ethanol . I only run ethanol free anymore. If I was in your shoes I year it down again making sure all jets are cleared out for sure. If make make sure diaphragm pump and enrichment assembly are assembled correctly and working as they are suppose to. Make sure it so out back together correctly, make sure gasket are not upside down and are sealed correctly. If you are 200% sure of this and still have a problem then there is a chance the carb is out of adjustment. This is a whole nother ball game. Last bit certainly not least and should be checked first is the fuel hose from tank to engine. The older style break down and even begin to collapse. If berserking down it just plugged your carb up all over again. If it's collapsing then it's restricting fuel delivery.
Im having a starting issue with my 95 mercury 2 stroke 9.9. I clean and rebuild my carb but after start in a few minute then engine died. Any suggestion will help. Thanks!
Did my carb on my mercury 9.9 97 model. But now every time i try to pull it to start it sound like its about to fire but only goes boom every time. Some tips?
It's always the carb!!! (unless some kid got a hold of it and ran pure gas, not mix like my idiot half brother does to chainsaws. I just rebuilt my 8hp carb, a gen before this one you have. The rebuild kit off Amazon for $20 did not have a sufficient bowl gasket so I made one from 1mm silicon. I noticed the main carb mount lower nut was so loose I could spin it off with my hand because that gasket had shrunk. If I'd have just tightened those nuts it probably would have run just fine but, in for a penny, in for a pound. I posted a video on making gaskets. Hey PS: replace the zip ties (plastic) with teflon ones as soon as you can. The plastic will get brittle fast and suddenly pop
Thank you very much! I'm having a problem with the bar you lock at minute 24.30. I don't see where to attach it to the other side. With you it is also loose in the video on that other side, but suddenly it is stuck as it should. Can you please help me?
@@CrappieCrushinTv Thanks! I see in the video that the right side of the arm is clicked on the black thing that is attached to the carburetor. I just can't see where to attach the left side of the arm. can you please help me?
Thank you for this. In the process of cleaning out and rebuilding a 1999 Mercury 9.9 carb. I got carb cleaner in my eye as well. Luckily nothing came of it. Have you done a water pump rebuild on it? I'm planning to do that after the carb rebuild.
There are some very good videos on here I watched before I did mine and although for mostly 25 horse engines and 9.9 hp they are the same as my 20 hp It has a few tricky parts but not bad. That was my first job one my engine.
Great vid, thank you. Silly question here: that white plastic canister to which the incoming fuel line is attached, to the right of the carb, is that a fuel filter? I've tried to unscrew it to inspect on my merc 6 hp, but can't get it to budge, and didn't want to force it in case its not actually "openable".
Thanks for posting Crappie. My 8hp carb was leaking fuel from the primer pump. I got hold of a new 9.9 carb that looks identical so tried to swap them out. The new 9.9 appears to be flooding and won't start. Going to check the float but is there anything else that would cause this? Or is it just incompatible even though everything lines up and looks identical? I took the primer diaphragm off the 9.9 and swapped it for the leaking one on my 8 and that is working fine now but I'd like to try the 9.9 carb on my 8hp just to see how it runs. Thanks again for the video.
@@CrappieCrushinTv 2004. Everything looks identical on the 9.9 and lines up, bolts primer pump, linkage etc. I can see inside the carb is flooded just by looking in the throat. The bowl and float look ok. If I recall most of the shutoff needle valves in the float I've seen have a small rubber tip. The 9.9 is just steel. Maybe it's not seating properly? Hard to believe on a new carb but I'm out of ideas. Thanks for any advice.
@@irishwake1000 Oh Okay it was an easy swap pre-1994. Things have changed like block size. You will need to change up several other things to make it work such as the 9.9/15 horse plate and tube plus. Prob looking at about 150.00 ish...... or More.
@@CrappieCrushinTv Great video! Do you need to change the same parts (plate & tube) when putting a 15hp 2 stroke carb on a 9.9 2 stroke Mercury? Thanks in advance for your reply and help!
Is there a way to rev these small 2 stroke outboards in neutral? I have the 20hp and i have to clean/rebuild my carb. But i was wondering if there was a way to slightly rev the engine before I decide to put it in the water
There is a “flip” clip that secures the shifting rod, at the top of the shifting rod. Flip clip and move shifting rod, to a position so it no longer works with throttle. Make sure prop is in neutral. You should now be able to rev engine.
Great video, thanks so much as I am doing the same thing on the exact same motor. Question... Don't ask but I somehow lost the needle valve for the float Bowl. I do not know the exact part number or how or where to find one. Any ideas anybody? I have no manual or anything like that to reference. Thank you very much
@@bryanhuff5671 okay I see a 96 so same as my 97. eBay is the place to get them. Rebuild with needle kit for your year specific 9.9 Mercury 2 stroke. If you are still unsure which one let me know I'll get you a link.
I hope mine is the carb too... my 25 hp doesnt idle. But i can still use it as long as its moving forward.. and it starts to bog when the fuel tank is low.,.. motor looks exactly like urs but 25hp.
I took off that neutral locking link? Idk what its called but i took off a link that locks the starting pulley when its in gear (drive).... so i can start it with the throttle open half ways or all the way if it doesnt wanna start. Lol
@@CrappieCrushinTv yes it is oem. some have two black/white wire coming oof of the cdi, n one is longer and one is shorter. I'm trying to figure out if the longer black/white wire goes to killswitch/shutoffswitch .
Nice video I have the same 9.9 Mercury but the tag on the transom mount is gone looking for model number for that engine I have the exact same one trying to find a re build kit for it but without a serial number very difficult if you could help Thanks custy
Sorry just got notified of your question. Did you get squared away ? Anyway serial numbers are unique to each engine to prevent theft and re titling. I could get you a model number.
