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    Junior Member windish62's Avatar
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    4120

    Hey guys I just bought an Ingersoll 4120 with a bad p220 in it. I have an onan gen set. The gen set is a marquis 5500 made in 98 I believe. I know I have to take 5 of the governor balls out to make 3600 rpm. My biggest question with this swap is does anybody know what hp this new motor would make? The model number on the motor is 5.5 BGM-FA/26105H if that helps.

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    Junior Member windish62's Avatar
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    Well I tore the motor apart and there is no flyballs or flyballs spacer on the cam gear. Now what do I do?

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    windish62
    BOTH engines are 47.7 CID.
    gen set,
    wrong cam and related front parts,
    wrong crankshaft,
    wrong BREATHER system, this could involve some work.
    PLUS more that i have not checked.

    IF you e/mail me [email protected]
    i will send you both manuals. ( gen set and P engine )

    thank you. boomer ( the used onan engine parts guy, also NOS and new )

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  7. #4
    Junior Member windish62's Avatar
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    Thanks for the reply Boomer. I tore down the original motor tonight and it looks like the flyballs spacer will fit right in the cam gear of the gen set. I figured as long as the flywheel will interchange the other end of the crank just has a fan bolted to it. Should be simple to fab that up. I will shoot you an email to get those manuals. Thanks

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