Going to scope the cam tomorrow. The distributor shaft has a small amount of vertical play (seems normal, not sure if it was bottomed out when intake manifold was mounted), no apparent horizontal play. It is still tightly mounted, and spins normally as far as I can tell..not terribly easy, but...
First post, first time digging into a mercruiser or any marine engine.
I have a 1989 4.3 v6 175hp gm block, serial number missing. I was unable to find a block code that matched anything online. I pulled the intake manifold and noticed a strange wear pattern on my distributor gear.
I am...