Home › Forum › Ask A Member › Just acquired a Johnson Sea Horse 10 convertible long/short shaft. › Re: Just acquired a Johnson Sea Horse 10 convertible long/short shaft.
Start with a compression test. Those QDs should be in the 90 to 110 psi range. Should be equal between cylinders.
If compression is good, check the spark. Pop off the flywheel. If the coils are cracked they will need to be replaced. If you don’t have the means to test the condensors, change them. If they have the original red tops, change them. If they have black rubber tops, they have already been done.
Dress the points, set at 020 and then clean with acetone. Spark plugs are Champion J6C.
On a new motor, change out the water pump impeller. Change the gear oil and crush washers on the plugs.
Did you get the pressure tank with it?
Thanks for the quick reply! No, I did not get a pressure tank with it.