What should compression be on a new 90 Yamaha 2 cycle OB with 10 hours of breakin time. thanks
B beachfeet Recruit Joined Sep 16, 2003 Messages 1 Sep 22, 2003 #1 What should compression be on a new 90 Yamaha 2 cycle OB with 10 hours of breakin time. thanks
F Fouled Plug Ensign Joined Jun 29, 2001 Messages 935 Sep 22, 2003 #2 Re: compression on new 90 two cycle OB My well-loved 90 Yammy has 125# in all 3, so I would expect yours to be a bit higher. Cylinders should be within 10-15% of each other, at any rate.
Re: compression on new 90 two cycle OB My well-loved 90 Yammy has 125# in all 3, so I would expect yours to be a bit higher. Cylinders should be within 10-15% of each other, at any rate.
L lonewolf5347 Chief Petty Officer Joined Jun 11, 2001 Messages 529 Sep 22, 2003 #3 Re: compression on new 90 two cycle OB I check my 90 hp 2003 yamaha after the 10 hour break in came up with 130 across the board .
Re: compression on new 90 two cycle OB I check my 90 hp 2003 yamaha after the 10 hour break in came up with 130 across the board .
A Anymec Seaman Apprentice Joined Jun 7, 2001 Messages 43 Sep 22, 2003 #4 Re: compression on new 90 two cycle OB Compression pressure kPa (kg/cm 2 ) 922 (9.22)<br /><br />This is from Yamaha:s service manual 2001<br />
Re: compression on new 90 two cycle OB Compression pressure kPa (kg/cm 2 ) 922 (9.22)<br /><br />This is from Yamaha:s service manual 2001<br />
