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Merc 25 1981 said Jeff and Graham has a type f carb

twizzle

New member
A couple of questions if I may

A couple of questions if I may

The manual says the carb should be type B but it is type F - is this compatible? and how do you check/measure the rpm? - the book doesn't refer to "sounds right" but quotes 800rpm in gear and in a tank!
Have done a compression check and the difference between the cylinders is negligible - but what psi should it be?
Would appreciate your comments again
Thank you
 
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