Motor Mount Boss

[78Southwind]

Can this be fixed if the broken piece is missing? It's the motor mount boss /water pump hole, any ideas how to repair (weld)? It not a critical portion of the block but I would like to have it repaired while the engine is out of the boat.

[WESTERNAERO]

That needs attention! Your motor plate mounts there, I wouldn't want to run it with one bolt holding that corner of the engine.
If I were you I would give it the whole engine to that westernaero guy and go build yourself something new.
Seriously, I would have it welded, and then you can drill it thru all the way to the fuel pump rod stop hole. Then re-tap it thru and it should be fine. You'll need to run a longer bolt that almost enters the cross hole.

[78Southwind]

That needs attention! Your motor plate mounts there, I wouldn't want to run it with one bolt holding that corner of the engine.
If I were you I would give it the whole engine to that westernaero guy and go build yourself something new.
Seriously, I would have it welded, and then you can drill it thru all the way to the fuel pump rod stop hole. Then re-tap it thru and it should be fine. You'll need to run a longer bolt that almost enters the cross hole.

Can a welder build the entire area up with a big blob of weld, then drill and tap it? I am not sure if that will work with cast iron. The rear plates use 4 bolts for each side (which includes the water crossovers).

[WESTERNAERO]

Can a welder build the entire area up with a big blob of weld, then drill and tap it? I am not sure if that will work with cast iron. The rear plates use 4 bolts for each side (which includes the water crossovers).

If the plates go all the way to the water ports then you are in much better shape. I would still have it welded but i don't think it's all that necessary. No you really can't build it up with weld but you could make a small chunk and have that welded on. It was repaired before, you can see where it was drilled in areas to get the JBweld to stick better. I would still drill and tap all the way thru.

[78Southwind]

If the plates go all the way to the water ports then you are in much better shape. I would still have it welded but i don't think it's all that necessary. No you really can't build it up with weld but you could make a small chunk and have that welded on. It was repaired before, you can see where it was drilled in areas to get the JBweld to stick better. I would still drill and tap all the way thru.

Yep...they go all the way to the water ports.

[WESTERNAERO]

Are you handy with a jig saw or do you have a band saw? I would make a new motor plate that is one piece. Connected in the middle so those aren't trying to spread apart. May be the reason that boss is blown out to the side to begin with.

[WESTERNAERO]

Something like this maybe.

[78Southwind]

That's the first thing I thought since my jet boat's motor plate is a one piece with an arch. They used a two piece so that there would be enough room to hang the water pump and the alternator on each side of the engine.

[WESTERNAERO]

Water pump? Do you have a sea pump, not a cam driven pump?
never mind your pics came up.

[78Southwind]

Water pump? Do you have a sea pump, not a cam driven pump?

Yep...Sea Pump. This engine was originally in a Cat.