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  1. #1

    Carb swap 4 1989 SP Project

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ID:	250355Hello all,

    New here, hope to get some ?s answered and contribut where I can. I have a 1989 SP from the original owner, all stock. My son and I have done the fuel system, pump and polish on it. Problem is I am having a hard time tuning it not to bog off idle. When it startd and runs I have to up on the throttle slow or it bogs, then it rock and rolls. If I tune out the bog it will not start easy.

    This has the old BN38 round with the fuel pump and metering on one side and an additional outboard Fuel pump. Rebuilt it all, replace lines and added a primer. So my question is can I convert thie to a Super BN, is there a bolt on replacement or do I need to get a different manifold? I have read that this old setup is hard to tune and get running correctly so I am thinking replace it. Any thoughts would be helpfull.

  2. #2
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ID:	250381I found this setup, I am not sure if it would bolt on 2 the 1989 yellow motor block. I would guess it would, does the switch to 2 carbs need a different rotary valve. Cables may be a challenge , but dooable (joke).

  3. #3

    Join Date
    Jul 2010
    looks good

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