With the drive up fully, pull the gland end hose. Then go to raise the drive. If oil comes out the open hose, your piston seals are bypassing. If no oil comes out, look at the HPU
Or you can have the drive all the way down and pull the blind end hose, then lower drive
Easy to test if it's the ram cylinder seal or the pump load holding check valve
Both cylinders are plumbed together, and act as 1 cylinder. So if one seal is leaking, they both will collapse
Really easy to shear the piston seal when inserting in the barrel
You have an AQ151 motor with an SP290a drive. The AQ151 is a motor/drive package
It looks clean
Make sure to grease the PDS
Pull the drive and do a full drive maintenance
Check the PDS shaft for play. If there is any, pull the motor and rebuild the PDS assembly with new bearings and seals...
So you wore thru the gel, the 1/8" of fiberglass, and now are to the core?
If the core is good, and dry, just grind, add 2 layers of 1708, and add some gel
Most likely you will have some core replacement to do first
Got pics?
That's the part number tag for the transom shield. By the part number, most likely a 290a. Used behind everything from a 3.0 to a 454 and some diesels
You need to get the serial number off the transmission input bearing section to identify the drive. However over the past 40 years, it may or...
New motor plus drive (long tail) is much much more than $20k. Just the motor in a crate is that.
Talk to the marina. The $20k is most likely for them to just pull the engine, get a remanufactured long block thru their supplier, add new manifolds and install with your old parts (oil pan...
