For outboard motor propellers, if your boat has a working tachometer than you can follow the same procedures outlined in our previous blog dealing with sterndrive boats. Using a tachometer is the best way to find the right size boat propellers. What if you don’t have a tachometer on your boat? This is very common if you have a small boat with a low...
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When world war II ended in 1945, Mercury was ready with two new motor models. A 3.2 horsepower single cylinder called the Comet and the twin cylinder 6 horsepower named the Rocket. In 1947 the engines were redesigned with a much more modern look and a third model was added called the Lightning. This new model was a higher RPM, 20 cubic inch, 10 horsepower...
Read MoreThe 1940 Mercury outboard boat motor was a very good looking streamlined motor compared to other brands at the time. The drive shaft was put inside a casing that also served to cover the water pickup line and a leak proof under water exhaust system. The water pump was also a huge leap forward in design using a Rotex rubber pump that did not need any...
Read MoreMercury Outboard Motors was founded in 1939 by Carl Kiekhaefer who at the time was a chief engineer working at a successful company not related to boating. Wanting to own his own business he bought a failed outboard motor company in his hometown of Cedarburg Wisconsin that produced Thor brand outboard motors, with the plan to produce magnetic separators for...
Read MoreIn the early years of the outboard boat motors development, many people started companies and made their own boat motors in the hopes of selling them and making a lot money. For various reasons most of them did not last long. Here a few of the ones that are known and a little bit of information about them. I’m sure that many guys made outboard motors...
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