How to Compression Test an Outboard Motor | BoatUS
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How to Compression Test an Outboard Motor | BoatUS |
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Video From BoatUS |
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This Video Uploaded At 22-06-2018 18:00:01 |
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Everybody hears about performing an outboard motor compression test, and everyone knows that when you buy a used boat, you should compression test the outboard. Yamaha outboard technician Sean Stahl from Annapolis Boat Sales says a compression test will help tell you how much life the engine still has, how much wear is on the piston and the piston rings, and how much air is being pushed through the engine. Essentially the engine is a giant air pump. You want to be sure the PSI reading for each cylinder is within 10 percent of the others. To do a compression test, your outboard must be hot. First remove the spark plugs, then remove the 15-amp fuel pump fuse to keep fuel from entering the cylinders. Thread in the pressure gauge hose into the first cylinder, then attach the gauge. Turn the key as if you were starting the engine and take a reading. Repeat in the other cylinders and then compare the readings. If they're all within 10 percent of each other, you're good to go. Learn more about performing compression tests at https://www.boatus.com/expert-advice/expert-advice-archive/2016/april/checking-compression-on-an-outboard-engine
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Autos & Vehicles |
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outboard compression check | how to compression test an outboard motor | how to compression test an outboard | testing compression in outboard | compression test outboard motor | testing outboard compression | four stroke outboard compression test | yamaha outboard compression test | compression test | compression check | compression test engine | how to compression test an engine | compression gauge | compression tester | BoatUS | Boat us | Annapolis Boat Sales | Outboard diagnostics |
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