I have noticed a slight misfire. I did a compression test, and had 110 psi on 5 cylinders, and 90 psi on the lowest port side cylinder. I ordered a powerhead gasket kit. When I opened the cylinder cover I noticed that cooling water had left a crust on the spark plug threads and on the cylinder cover (on the low comp. cylinder). I plan to do the cylinder o-rings and apply new RTV to the water passages. I also have the carb manifolds off for rebuilding. I can see carbon on the pistons and I'd like some advice on removing it.
Can I clean it without removing the pistons?
Is the dry rotted o-ring on that cylinder causing water infiltration to the cylinder which causes the misfire?
SEE PIC.......
Can I clean it without removing the pistons?
Is the dry rotted o-ring on that cylinder causing water infiltration to the cylinder which causes the misfire?
SEE PIC.......