merc 650 carbs

[greenoats]

my #3 cyl on my merc 65 horse 3 cyl 2 carb isn't firing.<br />after she runs a bit and I pull the plugs:<br />#1-covered in oil<br />#2-about half the oil of #1<br />#3-clean, but a little wet w/ gas<br />If I spray carb cleaner in the top carb at idle she wants to stall.<br />If i do the same to lower carb it seems to pick-up/smooth out.<br />Do you guys thhink just rebuilding carbs will fix my problem and if so what do I need to do so.<br />thanks, Matt

 

[Backlash]

Re: merc 650 carbs

Have you checked the spark? Sounds more like a spark issue than fuel.<br />Backlash

 

[sharkcat]

Re: merc 650 carbs

It sounds like its maintenance time.Get a manual,read the appropriate sections and:<br />Clean the fuel system from tank right thru the carbs.Reset float levels whilst the carbs are apart.Reassemble & do a Link & Synch.Decarb & new plugs if necessary.If this doesnt work the problem is electrical.Check plug leads.Run the engine at night with the cover off & look for sparks where they shouldnt be.Hope this helps

 

[greenoats]

Re: merc 650 carbs

I just put a rebuilt powerhead on so I'm mixing the gas at 25:1 instead of 50:1.<br /> I put new wires on. and checked continuity-good.<br /> I just cleaned the float bowls and that didn't help.<br /> 100 lbs compression on all 3 cyl w/ carbs closed.<br /> when I hold the #3 plug against a ground braid she sparks when cranking.<br /> So if anyone has any ideas I would appreciate them.

 

[greenoats]

Re: merc 650 carbs

bump