1997 Johnson 9.9

[bspeth]

I am looking at one later that needs work.What should the compression be and what gap should the spark jump? Owner thinks it is crudded up carb,but who knows.It comes with a bunch of parts which look new including impeller and he wants 75. so I thought I would have a look.Thanks-B

 

[vics]

I am looking at one later that needs work.What should the compression be and what gap should the spark jump? Owner thinks it is crudded up carb,but who knows.It comes with a bunch of parts which look new including impeller and he wants 75. so I thought I would have a look.Thanks-B

It'll probably run at anything over 60psi but id walk away from anything under 80 i think. Both cyls should be within 10% of each other.

Sparks should jump at least 3/8".