I did go with the RPMs.
But today I just ran the engine, the drive is currently off.
I was going to pop the drive cap, but I've not had that off before and I'm not sure I could accomplish anything! The drive shaft and U joints look good, and turning it by hand there are no weird...
Well, the thump/vibration was literally so violent that I would not have tried...plus I was THIS close to my slip.
But definitely not random.
I just got back from the club and ran that engine. No noises or vibration or anything abnormal at idle or rpms.
It only happens with the port drive. I don't know that I'd want to swap drives with them being counter-rotating (then forward is reverse and reverse is forward...)
I have not started it up without the drive off (just took it off last weekend)...I may do that today, but I imagine I would learn...
They are Merc Certified Techs, and I had informed them that it was counter-rotating.
But that drive was working fine for a time, I had planning on running up the river to test out but pretty quick the other engine was not working right so I turned around and came back in. While maneuvering into...
Thanks! That was my plan. When I but in a new impeller I noticed play in the prop shaft, so I took it to the marina and they replaced bearings in the lower unit. If they'd seen anything in there that didn't look good, they SURELY would have replaced/charged me!!
Props are brand new...
Thanks so much!
Both drives had been off for servicing lower units by me. I installed new starboard engine and I had marina align it. Then when both didn't shift correctly, I returned to marina and they also had both drives off and reinstalled, which was in September.
The problem drive is off...
Sorry if this is so long, but in desperate need of help!! I have a 1988 Celebrity Crownline Cruiser 28 with twin Merc 350s and Alpha Ones. I bought the boat cheap in the fall of 23 because it had a bad engine (starboard). Have been working on it since. Mostly myself, but last year I gave up and...
