Did I cause the problem myself?

[sambluckie]

If I over trimmed the lower unit, could the drive shaft assy cause damage to the bellows? The reason I ask is that when running boat at WOT, I can only get about 3800 rpms using the trim switch. I used the trailer switch to get up to 4100 rpms. Now I have a constant leak coming from what I believe to be the drive unit in the transom. Thank goodness I have an auto bilge pump.
If overtrimming caused my leak, is that why trim sending units are set to avoid this issue?

1985 Wellcraft
3.7 litre 4 cyl
Mercury Vengance 19" P prop

 

[TilliamWe]

Re: Did I cause the problem myself?

Overtrimming does not damage bellows.

Limits switched are there to keep you from ventilating the drive and over-revving your engine.

 

[sharkin95]

Re: Did I cause the problem myself?

when was the last time the outdrive bellows was changed? probably either the driveshaft bellows or the lower shift cable bellows finally gave way.

 

[CaptainMak]

Re: Did I cause the problem myself?

I used the trailer switch to get up to 4100 rpms.

The question is WHY ? You very well know those buttons are seperate for a reason !
If you want to change RPMS (for whatever reason), get a different prop. Problem solved.