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Free Yacht Chapter 4: Outboard Motor Mutilates Foot

Step 6Prop Test

Prop Test
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  • splash.jpg
This model has a clutch so the prop wasn't spinning yet. I engaged it and water got blasted around in the barrel. The barrel was on a wheeled dolly. Due to physics it jerked forward until the front of the motor hit it and stopped it. Fortunately the prop didn't bite a hole in it. Then the cooling water stopped squirting out of the engine. I shut it off. What went wrong? The water in the barrel was dirty and there was all sorts of crap floating on it. Note: use a clean barrel for this sort of thing or the prop blast will shake debris loose from it which will then plug the engine's cooling channels. Oof!. I picked some wood chips out of the engine's water outlet , dumped and reffilled the barrel and it was fine.
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Author:TimAnderson
Tim Anderson is the author of the "Heirloom Technology" column in Make Magazine. He is co-founder of www.zcorp.com, manufacturers of "3D Printer" output devices. His detailed drawings of traditional ...
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