1986 45 classic 50 converted

[stump32046]

I have a 1986 2stroke 45 which I believe (according to the serial a996603) started life as an electric start/oil injected model. The oil injection has been removed and now I have a primer bulb with a wm4 upper carb and a wm9 lower carb. Ther is no fuel pump mounted on the engine and I need a little troubleshooting help. This unit will do fine until it is shut off and sits for awhile then it runs on as many cylinders as it feels it necessary. Gets us back home, but is scary.

 

[carholme]

Re: 1986 45 classic 50 converted

stump;

That s/n comes up as a model:

1045726 MERCURY 1986 45

Parts listing:

http://www.crowleymarine.com/mercury-outboard/275.cfm

If you look under the Carburetor section, you will see that the fuel pump on this engine is side mounted to the carb.

Gerry

 

[stump32046]

Re: 1986 45 classic 50 converted

Just my luck, none of the free manuals cover this. I was hoping to get info on setting the carbs, timing and synchronizing!

 

[stump32046]

Re: 1986 45 classic 50 converted

On the chance of sounding "thick", when you pump up a primer bulb should it be hard? Not old and brittle hard, just hard from being pumped up.

 

[RogersJetboat454]

Re: 1986 45 classic 50 converted

On the chance of sounding "thick", when you pump up a primer bulb should it be hard? Not old and brittle hard, just hard from being pumped up.

Yep.

 

[stump32046]

Re: 1986 45 classic 50 converted

Soooo, would sucking air or leaky needle valves cause a squishy bulb?