Thanks , you're really easy to understand. My big problem is I'm getting backfiring on deceleration on my 25hrs merch. Any ideas?

What brand water pump impeller kit did you used for this video? Thanks

glad I found you I have a 1986 25hp 2stroke outboard, it been stored for 20 odd years and I used it this summer for the first time since and got it running pretty good, its virtually new and runs full power no problem, Ive tinkered with it as far as trying to adjust the carb but been reluctant to pull it out and clean it, as I feel it will start first time and not die here and there after a good cleaning, I also self installed electric starter and works perfect instead of pulling the cord, other fishermen have suggested I just buy a new yamaha motor to solve all problems, but as I said its basically new , just wanted to questionif the same directions apply to the 25hp motor thank you so much regards Bill

is this the same for a 25hp mercury 2 stroke 1986 motor, best instructions out there thank you

@14:08 - You reference a little BB that gets dropped back into the hole on that primer. What symptoms would be present if the BB were not there? I disassembled the carb to troubleshoot a flooding issue. There was no BB under the spring. It's not the first time the carb has been opened, so I'm wondering if the missing BB is causing the problem.

No worries got it sorted 😊

😂 got it sorted

Just realised your last post was 8 months ago daniel and you weren't obliviously answering to me 😂 im in a spin

Thanks Daniel 😮 I'm way past that stage now my problem now is that I cant seem to get it into forward gear correctly. I've removed the lower unit again because I thought the flywheel was preventing me from getting into forward but now that I have it apart again it's still the same , I cant even remember now which way the end of the shift rod was facing when I took it apart or does this only face the same way as in the video

Ok so I've managed to get it to fit back together but now it looks like I've got a bigger problem , when I put it into forward gear the prop still turns and clicks too , reverse seems ok as the prop wont turn and neutral seems ok too😅

Hi martin, any chance you could take a look back at the comments on the video u did on water pump replacement on a 2stroke. Im in a bit of bother and cant get the lower unit back together .

So after watching your video i went at my own and after an hour the job would have been done, but after another hour or 2 I still cant get the shaft to pop into place . Ive turned the flywheel by hand but still no joy .What am I doing wrong

The best video I've ever watched perfect now I can go do the job

You the man

Missing the check ball in the primer for the carb and want a cheap replacement? The detent ball in a 1/4 drive socket extension fits and works. I used a cheap extension from an impact extension (1/4 hex to 1/4 square drive) and carefully cut the ball out.

I did exactly what you did and it's not spraying barely? Any suggestions? My 9.9 1995 mercury could it be thermostat? I noticed alot of slop from pickup tube from pump to copper uplift water tube ? It also smokes alot I just bought it used ? Compression is cylinder 1 96 psi and cylinder 2 is 100 psi ? Is this typical normal for this year? The guy told me this motor set for 10 years? Thanks !

Finally ! A professional Mercury mechanic takes us behind the scenes and shows the public the correct way to do a water pump!

hey man just wondering how to just the timing and possibly adance the timing

hey man just wondering how to just the timing and possibly adance the timing

hey man just wondering how to just the timing and possibly adance the timing

Because the fuel and air passages in the carb body turn and redirect in directions you dont realise they can and often do project a stream of eye burning carb spray "right back into your face" its a good idera to wear chemical protection safety glasses whenever you use carb spray to clean a carb body.

Good stuff😊 thanks..

Thanks a appreciate the video

I am trying to insert the shaft back up to the hole into the top of the motor. It stops at 3 inches and will not go any further. I’ve even taken a dowel rod measured it put the rod up there so I can move it around in a circle I feel no hole or the shaft to go into and when I turn the flywheel, I can feel nothing, touching the rod what do I do here?

Great video, thank you, one correction, the pressure needs to hold for 10 seconds (from 100 hp Yamaha Service Manual)

Hi Martin I am getting 85 psi on my pistons on a 1998 mariner 2 stroke .. is that bad news ? It runs fine .. thanks Glen

New subscriber here...Great vids for fixing up my old 6 HP 2 stroke. Thanks for getting these out there. I have a question...it appears some of these small outboards have an adjuster at the throttle cam and some don't. Mine doesn't have the adjuster and any microfiche I can access on line doesn't show it as a part...what gives? Thx again.

Trying to rebuild my buddy’s carb on his new to him 2003 25 Merc. Can’t seem to find a kit. Why would they discontinue it?

Great video. I ran in to an issue.... After reassembling my fuel pump body is cracked and leaks. I suspect I over tightened it or maybe it is just too old and is falling apart. I have to order a new fuel pump kit now. Hopefully that gets me back on the water.

Mercury 50 hr

Hello, can you please provide the catalog number of the repair kits for this carburetor

I’ll have to try it tomorrow but this may of just solved my problem were my motor won’t start unless I take the cover off and give it some throttle by hand but maybe if I tighten that screw in the throttle it’ll start on its own now?

Excellent! Thank you!

Thanks for the great video. Just cleaned my carby on the 2002 15hp and your video helped me out big time!

Can you prime also by putting gas into the filter hole before you put filter back in.

This was a really helpful video and I was able to rebuild easily. However the little gasket shown at 6:15 in the video with the channel cut out. Should fuel come out of this when priming the engine with the fuel bulb? or have I missed something, Any help appreciated.

Thank you, sir! I'm back on the water.

i use an air compressor with an air nozzle with a cone rubber tip. plug one drain plug and send air through one. Press and release the air nozzle just slightly, but keep pressure on it for several seconds or minutes. The moment you pull the air nozzle away, there should be a rush of air coming out of the drain hole. If there is a leak somewhere, you won't get a rush of air coming out. i air check transmission drums the same way.

Very well done! Thank you

Hi there. I have a 15hp mercury 2 stroke. I’m missing the #37 screw. It’s the M5 x 30mm screw with a jam nut. Could you tell me what the adjustment is supposed to be on that screw? Engine seems to be running fine with out. Just want to get it back in there so it’s fixed properly

What if I discover the leak coming from around the prop shaft housing?

4.5 hp

Is this carburetor similar to a 1983?

Excellent video . Thank you

I just replaced my water pump and impellar.. my engine pisses fine at idle speed but with higher rpms it stops pissing. I never had this problem until after i rplaced everything. Have any thoughts?

Hola me podrían alludar que número de chicler lleva Mercury 15 hp americano gracias

Fuck carburetors damnit

very informative thnx

What is actually failing with these water pumps? Not much to them.. My unit is intermittent with the amount of water it picks up.. the impeller looks good- so I guess I'll spend the $250 for a water pump kit.

Sooo what happens if I lose that little bb?!👀👀👀