Need some help with a 1957 Sears 571.58931 12hp - starting issues

[chosos]

I have a Sears 12hp model: 571.58931. I'm told this is made by west bend for Sears/Elgin. There is also another model of this motor that is 5/7.5/12hp selectable via key.

I need some info on the motor
What is the default turns for this carb? Low speed needle? High speed needle?

points need to be gapped at .020 right?
plugs should be gapped at .030?
What weight gear oil for the lower?
And I believe the fuel mixture is 16:1.

I tore the carb apart and tried playing with the needles to get it going, but I just keep getting gas all over the plugs and it wont start. So I figure I ought to get some more info.

 

[chosos]

Re: Need some help with a 1957 Sears 571.58931 12hp - starting issues

anyone?

 

[Tom @ Buzzard Bluff]

Re: Need some help with a 1957 Sears 571.58931 12hp - starting issues

anyone?

The model # you quoted may be the reason for lack of response. Check it again---VERY carefully! If it turns out to be -58981 then you have a 1959 12 horse.

Start here <http://www.yankeeaomci.org/feature_outboard-2.htm> to look for tune-up data.

 

[steelespike]

Re: Need some help with a 1957 Sears 571.58931 12hp - starting issues

Tillitson MD carb 1 turn open both needles.All models 10-20 hp 56 through 65
are the same setting except for those with a fiixed high speed.
Fuel mix is 16:1 Originally H8J plugs set at .030,points @ .020.
Compression 85 psi.sae 90 outboard gear lube.

 

[F_R]

Re: Need some help with a 1957 Sears 571.58931 12hp - starting issues

Getting gas all over the plugs means it is severely flooded, or you have no spark. I'm betting on the latter.

 

[chosos]

Re: Need some help with a 1957 Sears 571.58931 12hp - starting issues

carb rebuilt. all is well - seems to be running now. i just need to figure out what the stock adjustments are and work from there