96 260

[williepahl_2]

can anyone tell me what my compression should be???


thanks

[STV_Keith]

I believe stock at sea level is supposed to be ~145#. I have found that for every 500' elevation you add, take away 2psi of cranking compression. Just my findings - not law. :)

[williepahl_2]

thanks that tells me why its running bad..120-122 on all six ...thanks for you input...

[STV_Keith]

What is your altitude there? How many hours on the motor? Anything done to it? Modified ports can also play with cranking compression.

[williepahl_2]

keith...im 620 feet aboue sealevel..motor has not had anything done to it that i know of..tech at mercury marine told me today that 130#. now when i ran the check..it was with a cold motor...just dont run right.. will it harm the engine to run it...i got my injectors and computer off getting injectors cleaned..and computer checked out...

bill