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Recent content by the_last_hour

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    suspected fuel pump problem, need help

    Hi guys need some help once again. twin 5.7 carbed 2006 crusaders w/ edelbrock 1409 electric choke..... The port motor will not start, starboard will. Fuel valves have been set so both engines pull off of both tanks without isolating them. After cranking FOREVER, with a push of the throttle...
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    Timing questions

    So I'm still questioning some timing issues. 5.7 2006 carbed crusader with Mallory unilite electronic ignition. My mechanic set timing at 12 deg, I set up the light on what I thought was #1 plug, and couldn't see the marks at all when it was running. I checked every plug wire until I could see...
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    timing question for 350 / mallory unilite

    This question has come up a few times with no certain answers on timing for idle for a 2006 carbed 350 with Mallory unilite dist. I had a lot of work done recently that involved new plugs, wires, re-set timing, etc. Before the work I was happy with my 1-1.1 mpg that fastJeff was helpful enough...
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    Can I run with different pitches on twins?

    When I had my 350's compression checked, one motor showed lower compression by about 10-15lbs accross all cylinders than its sister. The lower compression engine runs 2gph less efficient at cruise than the other when synched on rpms, and the difference moves up to 5gph when secondaries jump in...
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    coil question

    Since we figured out that the coil was causing my problem for the "i need the experts on this one" post, I now have a question about how the coil affects things. ` Can a analog tach have an internal problem that somehow messes up the coil? Through trial and error we noticed the following...
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    I need the experts on this one

    Motors are twin 300hp carbed 350's model year 2006. Started with difficult ignition problem and that problem is now resolved. We have a new problem after 30 hours of pro mechanic work we haven't fixed it. The symptoms are as follows... Start the boat leave the dock, get on plane, everything...
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    Low RPM motor noise

    "Several times, I've notic "Several times, I've noticed a noise that is only noticable at low RPM's. (350 cu) It only comes out of the port engine. It sounds like a chain, but it is not constant, it is more of a surging sound or droning. One of my passengers said it was knocking, but I would...
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    Is a breather hose to flame arrestor necessary

    "My hose to flame arrestor is "My hose to flame arrestor is always popping out of the valve cover and I want to either put a solid plug in the valve cover, or a breather plug, in it. Will this hurt me in any way. My auto guy says it will be fine. I still have a vacuum line to PCV valve in...
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    Flame arrestor needed for edelbrock 1409

    Who sells the flame arrestor t Who sells the flame arrestor that fits the edelbrock 1409? The one that came off the Holley won't fit.
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    Swapping holley carbs and questions

    "If I'm swapping my holley "If I'm swapping my holley carbs on my 5.7's, is it necessary to replace gasgets ( they are 1 year old), Is there anything special I need to know about removing the metal fuel line to the carb? (special tool,sealant?) The reason for the swap, is one engine burns...
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    Improved fuel efficiency plan

    "My current situation is this "My current situation is this - boat is a 29 phoenix disp = 10000lbs, twin 5.7 350's holley carbed, bought new as a "powerpack" in 2007. Props are 18" (unknown pitch) WOT is 4400 port 4000 star. Mileage is .6 mpg when fully loaded and .9 when light, I did get 1.0...
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