Outdrive locking up coming off of full throttle run
 

When I do a pass if I back out of the throttle very slow everything is fine, but if I pull back on the sticks more than a tiny bit and put the hull back in the water the boat gets a weird sensation like it is diesel it or the outdrive is locking up? The Roma bounce all over the place and a loose speed very quickly. If I let it come down to idle I can get back into it normally. Has anybody else’s experienced something similar? 26 daytona.

no does not ring a bell to me...
what is the roma??

Rpms sorry texting from phone.

feels like it is dieseling but when everything comes to a stop it is idling in gear just fine

Maybe a video could help... got that?

This might sound off wall but is it a D/P outdrive ?
Chopping the throttle on one is like putting the brakes on on a car compared to single prop units.

If you have thru hull exhaust make sure your flappers are still intact if you slow down to fast water could rush back up into engine.

If you’re pull back substantially from wide open, the propshaft speed will exceed the input shaft speed and the clutch will unlock and start pushing against the shift fork (and cam) which then will rub against the bump ring on the opposite driven gear which will make the shift fork rattle pretty badly.

Is this what you’re experiencing?

This was my guess too. I've experienced it also. Just don't cut the throttles so fast and it won't happen.

Hate to hijack, but is there any scenario similar to this that can make it seem like it pops into neutral? I have had situations where I'm chopping the throttle on and off and suddenly it seems like the pop blows out or it goes into neutral, engine revs freely, and I can't get any bite until I return to idle and slow back down.

I would think when you our chopping you are creating air and then cavitation

Is it by chance running L/H rotation?

Nope RH.

I think this may be what is happening. The bow comes down and the prop blows out maybe because the loss of speed or maybe because now my trim angle is too great or a combination of things. I’ll see what it does with my trim at neutral I had it up a bit when this happened last

Not sure why anyone would chop throttles or aggressively cut them, there is a stern wake that can cause some issues if that happens, could actually get into some exhaust systems if you didn't have flappers. Just come off plane nice and easy and see what happens.

I hear you. I am not chopping the throttles. I back out of a pull very slowly, but sometimes it happens. Always coincides with the bow dropping. Like it was packing air but when I reduce speed the bow comes down and starts this chain reaction

Trim the drives all the way in/down before coming to a stop....if you leave them trimmed up it will fall off plane and cause severe cavitation which I believe is what you're seeing due to the bow dropping and the stern raising. If I don't trim mine down all the way before a turn or slow down it does the same thing but I have a pretty short lower on my boat so comes with the territory.

Especially since you're in a cat...it's probably dropping the bow and pushing your pocket of air out the back and when the drive is trimmed up it just spins like it's basically out of the water and trying to grab anything it can.