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    volvo penta 4.3 bogging down at 3/4 throotle and above???

    I have a 66 20 ft Bertram Bahia Mar with 1990 Volvo Penta 4.3 ( 431) with dp 290 boats always ran great wot it reaches 43 mph on GPS. a couple weeks ago I noticed at 4000rpm it seemed to be running a little boggy. If I try to give it wot it bogs right down ... If I ease off the throttle it runs...
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    4.3 volvo penta removal

    I bought a 1966 20' bertram bahia mar for 1500 with trailer it was repowered in 91 with 4.3 volvo penta and 290dp/a outdrive . It runs like a top but has bad vibration . So i did a little research and decided to check the u joints. I took the top gearhead off the out drive and pulled u joints ...
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