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Hop

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    low power 90 merc

    in This Old Boat

    Posted

    HB2, you called it  Changed diaphragm in fuel pump, no change.  Talked w/ F. Barrett from .Barrett Marine, he insisted it was a fuel restriction problem.  So, I installed new fuel line and fuel filter.The fuel line had indeed delaminated inside and in fact a small piece got up into filter.  Motor runs like new now.  I failed to follow the K.I.S.S. rule.  (Keep it simple, stupid)  Thanks to all who replied with suggestions.

    low power 90 merc

    in This Old Boat

    Posted

    HB2, I tried an external tank w/dierent fuel line, same results.  Pap, are you saying there are 3 cdi?  Not sure what you met.  For the fellow with the 70 hp problem, I inherited a 1990 fuel injected from my dad, ran great, then started doing what you described.  Took to dealer, put new "power pack in ran and still runs great.  My kids abuse the heck out of that motor and it just keeps going.  Les, thanks for the offer, but wouldn't that be aiding and abeting the enemy??!   I pulled Dads egg sinkers, hooks, and needles out,e to I`ll drift w/sawbellies.  I think most guys have gone into "stealth" modr this week.  Have noticed something pretty interesting the last 3 weeks, will e-mail you.

    low power 90 merc

    in This Old Boat

    Posted

    Thank you for your experience.  I have pulled the fuel pump and am having that rebuilt.  Will see how that does.  For a non mechnics benefit, what is a cdi box and what does it do.  Is it easily accessable on motor and easily replaced?  Thanks again.  I am starting t panic cause the Seneca Lake Derby is next week!

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