BOXERDOGTY
Member
I took the boat in last week for new impellers and tune ups. Boy am I screwed! Motors are ten years old and probably (per mechanic who I trust and have used for 25+ years) never had impellers changed. They are an A1 MF to get to. Motors are low hours with dry joint manifolds. Had no reason to believe they would be suspect. (low hours, closed cooling, and no exterior signs of corrosion)
They had to pull manifolds to get at the raw water pumps to service. The manifolds and risers were horribly corroded and need replaced. The only explanation is reversion. I certainly wasn't planning on that expense but I have no choice.
I guess there is a silver lining though. He tells me nothing but pure luck saved the motors. For some reason there is no corrosion inside the heads or on the valves. They look as you would expect a 100 hour motor to look! Compression above 250 on all 16 cylinders.
I'm going to put 2" spacers under the elbows (the 4" won't fit under the hatch) and reversion kits in the exhaust hoses and hope it won't repeat itself.
Anyway, the sole purpose of this diatribe wasn't just to vent about my $6K tuneup! If anyone with closed cooling and dry joint manifolds are happy about your corrosion free exterior appearance, a peek inside may be worth a little peace of mind!
PS Now I'm gonna miss Gasparilla too. That sucks!
They had to pull manifolds to get at the raw water pumps to service. The manifolds and risers were horribly corroded and need replaced. The only explanation is reversion. I certainly wasn't planning on that expense but I have no choice.
I guess there is a silver lining though. He tells me nothing but pure luck saved the motors. For some reason there is no corrosion inside the heads or on the valves. They look as you would expect a 100 hour motor to look! Compression above 250 on all 16 cylinders.
I'm going to put 2" spacers under the elbows (the 4" won't fit under the hatch) and reversion kits in the exhaust hoses and hope it won't repeat itself.
Anyway, the sole purpose of this diatribe wasn't just to vent about my $6K tuneup! If anyone with closed cooling and dry joint manifolds are happy about your corrosion free exterior appearance, a peek inside may be worth a little peace of mind!
PS Now I'm gonna miss Gasparilla too. That sucks!
