How to Compression Test an Outboard Motor | Yamaha F225 Compression Test | Boats.net

Buy a compression test kit for your Yamaha outboard compression test at Partzilla.com: www.partzilla.com/product/aft...
See how to do a compression test on a Yamaha outboard. The Yamaha F225 compression numbers we get during this test will give us some clues about what is going on with this engine.
See where we’re working in this F225 outboard diagram: www.boats.net/catalog/yamaha/...
See a leak down test on a Yamaha outboard here: • Yamaha Outboard Leak D...
See how to do this job step by step: www.boats.net/blog/compressio...
VIDEO HIGHLIGHTS:
Removing cowling and cover - 0:50
Removing spark plug wires - 1:20
Removing spark plugs - 1:35
Compression test - 2:50
Find Yamaha outboard parts here: www.boats.net/catalog/yamaha/...
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In the video we’re working with a Yamaha F225 outboard motor, but you may have similar steps for your Yamaha outboard. If you’re not sure whether these steps apply to your motor, leave a comment and we’ll get back to you.
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[@osbornebay944]

Very nice work Sir, there are way over 15lbs differences. I checked on a F225 and top right is 125lbs and rest are 135-145lbs, owner says it has 700 hrs, I see 2500-3500 hrs. My 95 DT225 has 135lbs even and logged 2850 hrs, still good for a 2 stroke.

[@josedomena442]

John hi . Thank you for the video it has been a great help . I have a question regarding the doug clutch on a yamaha LF150TXRC the F stamp on the dough clutch will go towards de propeller or toward the shift selector . Is a counter rotation . Do you have a video that will explain how the counter rotation work the location of the pinion will change position if it is a counter rotation . Thanks

[@raymondvillarreal27]

When doing the compression test did you leave all spark plugs out

[@darrenalkire5281]

Any idea on what the hours are?

[@steveduncan131]

What numbers will I be looking for on a 2001 200 four stroke Yamaha thank you

[@rfesenko82]

Hi guys! What is the normal compression specs on the used 2002 F200 four stoke?