Yamaha v6 saltwater series 2 150 hp

Sc9208

Recruit
Joined
Oct 10, 2017
Messages
2
Hi , would any one be able to tell me what the compression test need to be for a Yamaha v6 saltwater series 2 150 hp and what the proper way to do it as I'm looking to buy a boat. Thanks.
 

boscoe99

Lieutenant Commander
Joined
Aug 22, 2013
Messages
1,785
Use a known good gauge. Motor needs to be hot. Battery fully charged. Throttle blocked wide open. All plugs removed. Kill switch pulled.

Insert the gauge and then crank the motor until the pressure stops rising. Write the pressure down. Do all of the cylinders. Ideally there will be no more than 15% difference between the highest reading cylinder and the lowest reading cylinder. I would expect a compression pressure of ~ 120 psi.
 

Sc9208

Recruit
Joined
Oct 10, 2017
Messages
2
Thanks for your help really appreciate. Do you know if there's any common. Problem with this motor.
 
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