How To Check Engine Compression - Yamaha Jet Boat

In this video we go over how to check your engine compression and understand what the numbers mean. You will need an engine compression tool with a 10mm Spark Plug Adapter. Engine Compression Tool https://amzn.to/3DaV5Dt Tools - Phillips Head Screw Driver 10mm Socket 5/8 Spark Plug Swivel Socket 6in extension Ratchet Intro - 0:00 About Me - 0:17 Choosing A Compression Testing Tool - 1:26 Removing The Air Filter - 2:34 Removing The Ignition Coils - 3:05 Blowing Loose Debris - 5:17 Removing Spark Plugs - 5:46 Installing Compression Tester Adapter - 8:17 Cranking The Engine and Reading the Gauge - 9:51 Reviewing the Results - 13:39 DISCLAIMERS: We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.