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With regards to the crankshafts with or without the oiling passages, right now I have 4 cranks on my workbench. I am building up a Model 500 Sea King (Lockwood Chief) motor. Two of the cranks have the holes in the rod journals and two do not. I bought one crank from Doug Penn and I think this is from an early Chief. It is my opinion that during the production of Lockwood Chiefs, they discovered the benefit of the oiling holes in the crank and put them in the later or last of the production Chiefs, my Sea King being one of them. Like the automotive industry, the outboards learned much from racing and it is my opinion that the BR motors might have been the first to have these passages in the cranks. The Lockwood engineers discovered the benefits and then moved the passages into the production line.
On my Model 500 Sea King, it came to me with a Lockwood Ace crank, mag plate and flywheel installed on it. The BR’s also had the same parts on them. 1930 was the last year of the Lockwood outboards. OMC had just purchased the company and decided to close out the brand. Remember this was at the beginning of the Great Depression and money was tight so OMC decided to reduce down their inventory by selling outboards to Montgomery Wards. It is my opinion that OMC assembled as many motors they could and sold them where they could to bring in capital to keep OMC afloat. My motor has the 3 ring pistons and the bronze rods.
Rick