I just had a 1989 I think, 155c power head (used) installed on my 1989 150 Johnson. It has a hard miss, almost like turning the key on and off rather quickly. It appears the port side 3 cylinders are burning clean (light tan not much oil residue on the plugs.) The right side 3 cylinders are very...
New to the board, I had my 1989 Johnson 150 power head changed to a Johnson 155c. My mechanic is working out some issues we have with bogging and not coming up to rpm's/plane very good. When we switched to this power head he un-hooked the VRO oil pump since that is what cost my 150hp to seize...
