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    140 Mercruiser Surges/Backfires at WOT

    hey guys, I've already posted on this same subject but haven't gotten enough replies so hopfully I can get some more advice. To update everyone, I have a Wellcraft america 170 with a 140hp Merc 3.0 I/O. Problem being at W.O.T. it surges and backfires through the carb. Idles great, starts great...
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    140 Mercruiser Wellcraft wiring/ fuse help

    I don't have any readings on my tac or engine temp gauages. The only fuses that I can find on the boat are the ones on the insturment panel. I can't find a fuse board or anything. Does anyone know where it might be if it has one at all? Secondly, where do the wires for the temp and tac go into...
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    140 HP Merc bogs, pings at high rpms

    I'm new to owning a boat, but have been around boats all my life. Since owning the 1985 170 wellcraft american as of april i've noticed after taking it out about 4 times that at high rpms at wot it bogs down and drops rpms and then raises back up to higher rpms then does the same thing over and...
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