Boat Inspection - Drive/Engine system

havoc_squad

Senior Chief Petty Officer
Joined
Mar 5, 2011
Messages
739
I am currently planning an inspection of a 1997 Sea Ray 190 with a mercrusier 4.3L V6 engine consider as a project boat to purchase.
I've already created a thread involving the fiberglass hull/structure inspection items for checking. However, I'm needing in this forum topic to focus on the items I inspect for the drive/engine system.


For $1,000 with decent interior from the photos of it, the engine from the description is probably to be written off as a total loss. It says head gasket, but that could be freeze damage, who knows what.

I'm planning to locally source a used GM truck 4.3L V6 engine with a typical used engine warranty depending on which type of V6 is it (vortec vs non-vortec). I've also expected that one or both of the exhaust manifolds may have to be replaced as part of this.

The big unknown for the drive system of course will be the outdrive. That's the item that will make or break whether this attempt is probably worthwhile.

Since I'm not going to be able to get a compression test and leak down test done, I'm trying to determine what is my checklist of items.

1. Make sure all parts on the engine and outdrive are there and not damaged or left disassembled.
2. Check for gimble steering arm play and ensure no damage to gimble ring or gimble housing.
3. Inspect outdrive for critical damage/neglect that would make it a no-go.
4. Check the drain plug of outdrive for any water if the owner will allow it.
5. Check the gear lube reservoir if has any water intrusion/milkshake.
6. Determine from the owner if the engine can be ran as is temporarily to verify quickly a few things. Drive shifting would be the big one I would think)
7. If engine is dead, check that shift linkage and drive shaft works as expected when put into gear and taken out of gear.
8. Check drive trim system for proper operation.

Feel free to list any checklist items that I might have forgotten for the drive system/engine inspection.

Also, other than a light and phone, list any common inspection tools that might be important to bring.
 

achris

More fish than mountain goat
Joined
May 19, 2004
Messages
27,468
I would also ask that I could remove the drive and inspect the unis and gimbal bearing. This would also let you see what condition the input shaft is in (rusty) and if the front seal is leaking...

Good luck,

Chris.......
(BTW, drive removal is very quick and simple. As is replacing it. If in doubt, see my videos, link at the bottom of my signature)
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
50,338
technically both your threads should be merged

as I stated in your other post where you called the interior moldy and you mentioned the motor was not winterized and most likely damaged. I would run.

your drive could be fully filled with water and the lube reservoir would never show signs of it. you nave to drain the gear lube to see if there is water intrusion.
 

DWABoat

Cadet
Joined
Mar 20, 2018
Messages
8
I adopted a 1989 Sea Ray 5.7 Alpha One Gen One ten years ago as a Hurricane Katrina survivor. After doing lots of fiberglass work, I just finished pulling and replacing the engine/gimbal for two reasons:
1. The transom rotted out - I rebuilt it. It is now better than factory. Very difficult and expensive.
2. The gimbal housing corroded through immediately below the gimbal bearing and let water flow inside the driveshaft bellows. The only way to see this is to remove the outdrive. The only fix is to replace the gimbal housing by pulling everything out.

i have definitely learned a lot about fiberglass and boat construction and about Merc stern drive systems.

The most important thing I learned is that I will not ever adopt a project boat again.

I would recommend avoiding this boat and get one you can use.
 
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