280 SS pulls to the left

[NorCal Boater]

Thanks for the info.
I am unfamiliar with the Bravo 3 dual prop.
I thought all mercruiser drives use the rubber hub in the props to prevent damage to drive if prop strikes an object

I think they're Bravo 1s

 

[cfd95]

I think they're Bravo 1s

oops my bad I need glasses

 

[Lazy Daze]

Bravo 3's have absolutely no hub whatsoever - it's a metal to metal connection. Bravo 1's (and most Alpha's, too) typically use a hub, but it's different than what you're probably imagining, CFD. It's actually a user replaceable plastic insert. It's usually a 'work or no work' situation with these. Meaning, it doesn't start to 'slip' like the old-style, pressed-in hub I believe you are thinking of. This is all, of course, on the assumption that there is not some other type of props on there than original. But if the hub WAS slipping, we would usually expect to see a rise in RPM's.

 

[Night swimmer]

Unless someone put on an old, crappy prop, you won't have a typical "rubber hub". If the hub in that prop was bad, you'd know it - that engine would over rev when a load is put on it. However, you can easily check by using just one engine at a time. In fact, doing that (and noting performance) can help in many ways to compare one engine to the other.

That's definitely something to try. Run just 1 engine and see what you get for speeds and different rpms. Then try the same with the other engine. That could tell you if you had a lack of power in one engine. I've never had a twin engine boat but it's a good thought.

If one engine has less power than the other than it may wanna pull towards that side.