65 mercury 900 cuts out in gear

nigger

Recruit
Joined
Oct 4, 2003
Messages
4
Ineed help troublshooting my 1965 mercury 90hp. Runs fine in neutral but seems to cut out like if plugs were fouled?
 

The Marine Doctor

Commander
Joined
Jul 25, 2003
Messages
2,177
Re: 65 mercury 900 cuts out in gear

Check the compression and spark and report back to us please.<br /><br />Also..squeeze up the primer bulb and see if fuel leaks out the carbs.<br /><br />TMD
 

nigger

Recruit
Joined
Oct 4, 2003
Messages
4
Re: 65 mercury 900 cuts out in gear

Did all that, still runs like ****, But today while out in the water, sprayed carb cleaner in bottom carb., ran good. until I ran out of cleaner. So what is it?
 

andrewkafp

Lieutenant Commander
Joined
Mar 15, 2003
Messages
1,668
Re: 65 mercury 900 cuts out in gear

Sounds like fuel delivery problem.
 

y2j

Petty Officer 3rd Class
Joined
Jun 12, 2003
Messages
89
Re: 65 mercury 900 cuts out in gear

it may be misfiring because of clogged carby's .. Spraying cleaner in will do fawk all.. You gotta tear em into pieces and dip them minus the rubber bits in the carb cleaner solution overnight. They will come out brand new<br /><br />Then put it back together and tune the carbs... Before you do all that.. Replace the spark plugs, time the engine. It could be one of your powerpacks or coils are going bung too<br /><br />If you don't have a manualget one .. best $35 you can spend :)
 

nigger

Recruit
Joined
Oct 4, 2003
Messages
4
Re: 65 mercury 900 cuts out in gear

How do I test the coil??? Runs great out of water, even in gear. But the second it hits water.... cuts out...really sounds like ****..
 
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