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Recent content by ddabal

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    1987 454 ignition amplifier/upgrade

    Thinking of changing the ignition system in my 87 454/330 formula to something newer. my question is what exactly does my ignition amplifier do? if I put in a new HEI distributor can I just eliminate it. was told I would need at least #12 wire to distributor, will my current hot wire in the...
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    BBC wont idle down below 1500 then stumbles backfires

    "I just put a rebuilt 454 gen "I just put a rebuilt 454 gen v motor in my formula. I bought it used, it came with all the paperwork only 1 season on the motor. it has a dui ignition. the problem is I cant get to motor to idle down below 1500 or so rpms. turning the idle adjustment screw out...
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    Mercruiser wont idle backfires

    "just put in a new(to me&# "just put in a new(to me)7.4. I bought it used rebuilt 2 tears ago. Standard 454/330 Gen V block. It has a DUI marine ignition, electric fuel pump and marine demon carb. I was told it shoud start and run fine. Well no problem starting it but I cant get the idle douwn...
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    37 resistor wire getting hot

    "had my 3.7 rebuilt and just g "had my 3.7 rebuilt and just got done installing it. not much to deal with from the electrical side of things, a few connections, very straight forward. the problem now is that when the key is turned on the resistor wire gets extremely hot very quickly, would...
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    454 Gen IV to Gen V swap flywheel question

    "removed the old Gen IV in my "removed the old Gen IV in my formula, I'm putting in a new rebuilt Gen V motor, the question is can I use my old flywheel or do I need to get one spcifically for the gen V motor? also what about the coupler, do I need to change that also.? the old coupler was the...
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    Mercruiser 454 Gen IV to Gen V swap flywheel question

    "I pulled my old 454 gen IV ou "I pulled my old 454 gen IV out of my formula and am replacing it with a new rebuilt gen V. the new motor doesnt have a flywheel, Can I use my old one or do I need to get one spcifically for the gen V motor? thanks"
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    Exhaust question

    "I just bought a formula(1 "I just bought a formula(1988) that is running the exhaust out through the drive, the boat has the silent thunder platform on it and I believe it was changed at some time.probably because the platform needs some work) I would like to go back to the silent thunder...
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    Aplha drive water pickupimpeller question

    I would like to use a system l I would like to use a system like the newer bravos use for raw water pick on my alpha.(eliminate the impeller) the question is do I simply remove the alpha impeller once the engine driven pump is installed? will the new pump pull the water up through the original...
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    Alpha one gears

    someone told me that mercury m someone told me that mercury makes a heavy duty gear set for the alpha drives which will allow them to handle more hp. anybody know anything about it? I have one of the big block 454/330 /apla one combinations mercury used for a few years(before they knew better)...
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    454330 pushrods

    I'm rebuilding a 454/330 g I'm rebuilding a 454/330 gen IV motor. I read that the Gen V pushrods are a slightly shorter than the gen IV. the motor was rebuilt before and it seems like the pushrods are the shorter ones(measured.)are they interchangeable? or should I make sure I have the right...
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    Mercruisercrusader swap

    "Does anyone know if a 454 cru "Does anyone know if a 454 crusader can engne can be used to replace a 454 mercruiser. I'm talking about just using the crusader basic motor and changing all bolt on accessories to the ones from the mercruiser, IE Starter, water pump,exhaut manifolds etc. will...
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    Mercruiser 454 oil pump

    "I need to replace the oil pum "I need to replace the oil pump in my 454, is there a difference between a mercury marine and a stock chevy or good aftermarket pump. at almost triple the price for the mercruiser part I would think there would be. or would either of the others work just as well?"
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    454 heads

    does anyone know if I can rela does anyone know if I can relace the heads on my 454 " small port peanut heads" with an older set of large oval port 781s I have. I have heard that the 781s are very good heads.althought their both GenIV the older motor has different pistons.if possible would it...
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    454 intake manifold gaskets

    this question is a follow up t this question is a follow up to prevoius post "454 inake/heads".I just picked up what I thought was the correct fel pro head set for this motor. 1990 gen IV / small oval port heads. the intake gasket that came in the set is for the large oval ports. Did I somehow...
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    Mercruiser 454 intake manifoldheads question

    "I have a 454/330 mercruiser 1 "I have a 454/330 mercruiser 1990, which bought the farm. I just picked up a new (rebuilt longblock). the question is this, the old motor had the large oval port heads, the new longblock has the small oval port heads. Can I use my old intake manifold (from large...
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