Setting carburetor float height, Mercury 2-stroke 50hp

[ironring1]

I'm having trouble setting the float height on my carburetors. I'm doing this because my idle is rough but seems to be tilt/trim sensitive. At some trims it idles well, not so much at others.

The Clymer manual says the height should be 9/16" from the top to the sealing surface to the top of the float. The problem is that it is impossible to get it that low. I can get it to just under 5/8", but the float bottoms out on the casting before it gets down to 9/16".

Carbs are WME-68, pictured below in case I've got the spec wrong. Any help would be greatly appreciated.

 

[Mc Tool]

I just googled " wme carb "and float setting popped up . It appears there are a couple of methods , but basically you adjust the float so when carb is inverted the top edge of the float should be parallel to the gasket surface
Maybe this will help

 

[ironring1]

I just googled " wme carb "and float setting popped up . It appears there are a couple of methods , but basically you adjust the float so when carb is inverted the top edge of the float should be parallel to the gasket surfaceView attachment 416017
Maybe this will help

That is what I ended up doing in the end.

After I reinstalled the carbs and did a link & sync, I did a seafoam decarbonization on the engine, followed by a new set of plugs. Seems to be happier now. Looking forward to getting back out on the water to do some more testing...

 

[airshot]

If your going to keep that motor, get a real factory service manual and use the Clymer for toilet paper when your roll goes empty.

 

[jimmbo]

If your going to keep that motor, get a real factory service manual and use the Clymer for toilet paper when your roll goes empty.

Not even good for that, plus you risk getting a Vasectomy, I mean a Paper Cut

 

[Mc Tool]

Not even good for that, plus you risk getting a Vasectomy, I mean a Paper Cut

Classic Clymer mistake
Ring end gap (in cylinder bore) , look in the right hand column and see that 0.70mm is both 0.028". and 1.000"

 

[ironring1]

If your going to keep that motor, get a real factory service manual and use the Clymer for toilet paper when your roll goes empty.

Could you point me at a reputable one or a good source for the OEM one? Digital is fine by me. When I search "factory service manual" I get all sorts of results.

 

[jimmbo]

If you have the Serial# of the Engine, you can go on Ebay, and search for Manuals for Mercury 50hp . Mercury Manuals will have the Range of the Serial #s covered in that Manual on the Cover.

 

[airshot]

Could you point me at a reputable one or a good source for the OEM one? Digital is fine by me. When I search "factory service manual" I get all sorts of results.

Most of mine have come from Ebay, digital downloads are available if you post model name and serial number. I found a download for my I/ O but was almost 900 pages...most were blank pages for notes and pictures. From my thumb drive I just printed out the pages I needed when I needed them. Factory manuals are far more precise and give trouble shooting ideas not found in aftermarket books.