86 Merc 8 hp idles only with choke on partially

Roger T

Recruit
Joined
Aug 18, 2009
Messages
2
My motor starts up Ok but only runs with the choke partially on. If I put it in gear and full throttle it will run without the choke. As soon as I decrease the speed the motor stalls.
 

Fuzzytbay

Chief Petty Officer
Joined
Jun 6, 2008
Messages
557
Re: 86 Merc 8 hp idles only with choke on partially

Sounds like not enough fuel. Choking makes the fuel mixture richer, ie more gas. I'd look at your fuel system, fuel pump, carbs, ect.
 

Roger T

Recruit
Joined
Aug 18, 2009
Messages
2
Re: 86 Merc 8 hp idles only with choke on partially

Thanks for the reply.

I looked at the choke linkage and there is a cam that I adjusted. It increased on the movement of the buterfly valve in the carb which increased the idle speed by increasing the fuel.Then I richened out the mixture :)a little.

It is working good in the tub so back to the boat with it.
 
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