Search results

  1. N

    OMC 7.5 Exhaust Manifolds Needed

    If anybody has any idea where to locate a set of OEM or aftermarket exhaust manifolds for a OMC 7.5 (Ford 460), I would be interested in buying them. I have tried the "adapters" that are supposed to adapt the Ford heads to be able to use big block Chevy exhaust manifolds, but have have...
  2. N

    Don S. - Am I crazy?

    The engine is a Volvo 5.7Gsi PEFS. The customer's complaint - the ever popular "loses power under load". And he adds when it loses power there is a strong fuel smell and "pinging" noise. When I go to check it out the engine has original plugs, wires, cap and rotor. A few throttle "snaps" and I...
  3. N

    Engine guys - need help with 4.3 Volvo

    The engine is a 2001 Volvo 4.3Gi (Vortec V-6 roller cam / balance shaft engine) 250 hours. The problem: Unidentified engine noise. <br /><br />Sounds similar to a lifter noise at idle. It is very noticeable tap tap tap at idle, and goes away when engine is running (no load) at a slightly higher...
  4. N

    Need advice from certified Volvo tech

    It seems that virtually every older volvo drive I see has play in the steering fork. Usually about 1/8" play that allows about an inch of movement in the drive. Is there an acceptable amount of play, or should it be tight?<br /><br />Dave<br /><br />
  5. N

    Pertronix Ignitor OMC ESA "Fix"

    I have a customer who wants to install a Pertronix Ignitor conversion on an '88 OMC 7.5 / King Cobra and will need to use the "fix" suggested by Pertronix for use with the OMC Electronic Shift Assist. I know that it has been discussed here many times, but can anyone share how they actually...
  6. N

    Mercruiser 496 HO - Difficult Diagnosis

    This one almost kicked my butt. Since last June (off and on) I have been working on a 39’ performance cruiser with twin Mercruiser 496HO / PCM555 engines. The starboard engine had an intermittent problem with momentarily losing power. The engine would “lurch” (bog for a second and then return to...
  7. N

    EFI Code/Timing Tool - Make for $1.00

    After doing a little research I discovered that it was very easy to make a simple, but very useful, Marine EFI Code reading and clearing / Base Timing Tool. And you could make it for under $1.00!<br /><br />Materials needed:<br /><br />One 12volt resistor type LED light<br />One small paperclip...
  8. N

    MSD Ignition - Question for Techs

    I am looking for anyone who may have information on ignition scope analysis of MSD igniton waveforms. Have looked everywhere I can think of and can not find any info.<br />Thanks,<br />Dave<br /><br />MSD Ignition waveform showing four firing events at idle (Mercruiser 502Mag - all cylinders...
Top