compression test

[brinky]

Ok, have done a compression test today, both cylinders were 155psi, is this normal for a 50hp ?
Have done other basics like change plugs, check butterflies open fully.
Will now change prop to try and get more than 4000rpm.
Has anyone tried a 4 blade prop on a 50hp ?

[Nos4r2]

Originally Posted by brinky

Ok, have done a compression test today, both cylinders were 155psi, is this normal for a 50hp ?

That's bloody good!

Originally Posted by brinky

Have done other basics like change plugs, check butterflies open fully.
Will now change prop to try and get more than 4000rpm.
Has anyone tried a 4 blade prop on a 50hp ?

A 4 blade will lmake it hard to work out the right pitch. Stick to a 3 blade,manufacturers standard ally type prop 'til you've got a benchmark.

[brinky]

Thanks thats good to know....