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    Mercruiser 4.3 Backfire and power loss at higher rpm

    Recently have set the base timing by grounding out the purple wire and setting at the recommended 12 deg BTDC. This is the first time I’ve had the boat out since then and also the first time since winter storage. It runs and starts fine until higher rpm (4K plus) where it pops and loses power...
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    Yamaha 5.7 stern drive bellows change

    Hey guys, I’ve contacted Ken, who is not into Yamaha anymore, and have emailed Crowley marine for parts but they have not got back to me as of yet about associated parts, materials, gaskets etc to do the job. can someone point me in the right direction as to what parts would be advisable to...
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    Help finding replacement for my 1998 4.3l mercruiser motor due to freezing.

    Hi all, I’ve done a small amount of reading as to what is needed to replace the block on my motor. It blew out a freeze plug and after replacing and restarting, all seemed ok until the frothy mess started to emerge from the Pcv line... so that was yesterday and today I’m wondering, what is the...
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