Outdrive rubber boot

[JBtwist]

So, over the weekend I started noticing that my bilge (which never pumped water out) was pumping a decent amount of water out. So, when we got home, I got up underneath and we have at least one crack (hole) in the rubber boot. I assume it's original equipment - 1986.

It's a 1986 OMC outdrive 3.8L engine.

Pics attached. Are these boots standard sizes? Where do I start?

 

[kenny nunez]

If you remove the propeller and the trim tab, it is possible to slip the new boot over the drive with some liquid soap and some patience. If your engine has power trim be sure to try and have the engine at mid point of the trim cycle. Also make sure that the lag screws in the stringers are still tight and the engine is not moving around. Sometimes the front of the engine goes up too high and the boot gets crushed under the intermediate housing on the boot transom cut out.

 

[JBtwist]

OK. Interesting.

My trim motor runs, but motor doesn't raise or lower. I can't figure out why, I think I have a hydraulic issue. Haven't dug into that one yet. When you say "trim tab" - what part are you referring to?

Also, "lag screws" - are you referring to screws that go through the transom into the stringers?

Finally - Are they all standard sizes? How do I find the one to fit my boat?

 

[Redrig]

There are a couple different seals , based on the year.

You need a 909527

 

[kenny nunez]

The trim tab is what is bolted on the rear of the cavitation plate. Lag screws hold the engine mounts down to the stringers. They should be tight, probably 3/4” hex, check them on all 4 corners.
If there is no hydraulic fluid in the system then the engine is moving up and down on it’s own, this has to be repaired because the boat is running in the full “down bow” mode since there is no hydraulic fluid in the engine mount rams.

 

[JBtwist]

The trim tab is what is bolted on the rear of the cavitation plate. Lag screws hold the engine mounts down to the stringers. They should be tight, probably 3/4” hex, check them on all 4 corners.
If there is no hydraulic fluid in the system then the engine is moving up and down on it’s own, this has to be repaired because the boat is running in the full “down bow” mode since there is no hydraulic fluid in the engine mount rams.

This is very helpful. Should there be a resivour for the hydraulic fluid? I can't find one. I'm certainly running in the "down bow" position.