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#1
02-21-2008, 07:23 PM
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what is normal PSI on 1999 fuel injected yamaha ?
Looking for factory spec. or close, also confused about measuring with plugs in or out of all cylinders??Thanks in advance!
__________________
I heard it on the coconut telegraph.......... 
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#2
02-21-2008, 09:16 PM
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Re: what is normal PSI on 1999 fuel injected yama
I think Art at BRP tech said production motors were 90- 130 for my 96 150. What you want is even comp.< 5% low to high all plugs out + motor cold. Others here can be of more help.
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#4
02-24-2008, 02:41 AM
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Re: what is normal PSI on 1999 fuel injected yama
good point, and question, Was looking for Cylinder Compression, I believe fuel pressure is 35 psi. Sorry for the confusion
__________________
I heard it on the coconut telegraph..........
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#5
02-24-2008, 04:17 AM
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Re: what is normal PSI on 1999 fuel injected yama
I had a 1988 2.6L 200 that had 115psi - 120psi in all 6 cylinders. I know it's not the same motor, but it's the same 2.6L block . . . As far as testing the compression . . . you want to remove all the plugs. This allows the starter to turn the flywheel faster (not compressing the other 5 cylinders), so you get a more accurate reading.
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