While running about 4000 RPM’s I heard an almost grinding sound. Upon exam my trim tab was gone (it was replaced recently), my prop was bent on the edges, and my prop shaft has a slight bend to it. Is it possible the trim tab did this. The motor did not kick up and no damage to skeg or nose cone.
It sounds like to me somebody put the wrong trim tab on the motor when they replaced it. You need to get the prop shaft fixed ASAP. If you run it like that, most likely will damage the seals, which in turn could let SW damage everything in the lower unit.
we see numerous motors lose the zinc tab above the prop
we use yamaha zincs, and torque them like yamaha requires, and we still have customers engines that lose them.
I have even called yamaha about using locktite or something similar, and they say NO.
seems the worst on the f225 and the 300hpdi
Lost 2 on a 300 hdpi that were torqued down, used locktite on the 3rd one and so far so good. Yamaha give any reasoning behind not using locktite?
Russ B.
www.joinrfa.org
God is great, Beer is good, People are crazy
I just replaced my zinc tab on my motor when i did my water pump. I had used some anti seize when i had replaced the tab the last time. I had no issues with the tab & anti sieze, wonder why Yamaha says no locktite?
21 Contender
Only thing I could think of why they wouldn’t want locktite there is it might be preventing a good electrical connection between the bolt and zinc. I put it on the bottom of the internal threads on zinc rather then the bolt threads to ensure a good connection.
Russ B.
www.joinrfa.org
God is great, Beer is good, People are crazy