I am hoping that the someone may be able to provide me with some insight and assistance with the identification of the engine in our boat. The engine does have the original ID plate attached to the exhaust manifold and the number on it matches the hull card. The thing that has me questioning whether the engine is original are the numbers stamped on the starboard side of the the engine block (just below the head). The numbers read "664563" and directly under that "IXBM". I understand that we are dealing with a Hercules IXB engine and suspect that the "M" may refer to "marine". I haven't been able to find too much info on the casting dates for the old Model B engine but I did see one reference that would indicate that the casting date for this block was much later (mid 50's I believe).
The engine itself is "stuck" solid and I am trying to determine whether I should go to the trouble of trying to revive the old block or look for a replacement. I appreciate that it would be better to keep the original motor if it is in fact the original.
What I do know is that the original owner was an old hydroplane racer from way back and at one point figured out a way to supercharge the old model B. There is a good chance that he may have destroyed the old block at some point and simply stripped some of the old working parts and put them on a newer block in the 50's.
Don,the serial number on the ID plate on the under side of the engine cover is "B-4728" which matches the serial number on the plate riveted to the exhaust manifold.
I might also add the engine has been painted a red-ish color similar to the bilge paint color. Also, it appears to have been changed to a 12V electrical system a long time ago as the alternator, coil and starter all have 12V markings. I have the feeling that the block is not the original but wanted to be sure about it. As mentioned in the first post, the stamping on the side of the block below the head is 664536 IXBM.
Thanks Jim....I ordered the standard "research package" from the mariner's museum a few days ago; so I am still waiting for that information. Do you think that the information you referred to will come in the "standard" package or would I need to get back in touch with the MM to have them dig in the book you referred to?
That said, if it is determined that the block in the boat is not original, I am still interested to figure out how old it may be. I am obviously not an expert on these old engine but I do understand that the older B engine had a "babbit bearing" setup whereas the later ones did not. Maybe I just need to break the engine down and see first hand what I am up against but was hoping to save myself some work if I am looking at is not original to the boat.
It would be a special request to confirm in the "Engines" book. Will not be part of the research package.
I have a B serial# 3843 with block #41307 and a B#31964 with block#2482344.
No way of telling if either is original.