Mercruiser Oil Pan Replacement

tank1949

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I have just completed replacing rotten transom that an incompetent marine surveyor missed. Former owner had installed (2) Chevy 383 "stroker" motors and what looks like Moroso extra capacity oil pans and oil drainage kits. The motors have mechanical fuel pumps so I am fairly certain that blocks have split rear main seals. However, the Moroso oil pans were almost touching outward motor mount stringer/stands before re-glassing. Since I have re-glassed, I may have added materials which may reduce bilge area required by the oversized oil pans. I have located several traditional aluminum marine oil pans online. But, I don't know if "stroker" motors require these oversized oil pans. Obviously, the extra oil plumbing hardware would have to be reconfigured or replaced to accommodate a standard oil pan. I hope all fits but I like to know options if I added too much glass. I have included photos of 1 pan and glassed area.
 

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Scott Danforth

Grumpy Vintage Moderator still playing with boats
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I would relieve the fiberglass for room for the oil pans

extra oil capacity is always a good thing

you have to know what you have for a block - just run the casting number and it will tell you.

worst case, pull the pans, cut a bit of the bulge off and re-weld.
 

Bondo

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But, I don't know if "stroker" motors require these oversized oil pans.

Nope,.... They don't,......

Only way to know which rear main ya got is either Look, or run the castin' numbers, found on the aft block flange, usually port-side,.....
 

tank1949

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Nope,.... They don't,......

Only way to know which rear main ya got is either Look, or run the castin' numbers, found on the aft block flange, usually port-side,.....

Casting number indicates 350 block 4 bolt main and made in Mexico. These blocks, according to former owners build sheets, were built form scratch. They were not ordered from factory as "stokers."
 
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