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    2003 Mercruiser 4.3 TB-V No Spark

    I found a similar post that ended without a solution, so I copy and pasted the intitial post to save time in typing: I have a 2003 merc 4.3L with thunderbolt V ignition -I have 12 V at the + on the coil, it is within .3v of battery voltage. So very little wiring resistance -I have 12 V at the...
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    ?-20 Aluminum locknuts ? engine to transom -

    Guys, When installing the 4.3 Vortec back in my Pontoon, one of the ?-20 Aluminum locknuts stripped that attaches the rear of the engine to the transom. Are these aluminum locknuts critical, or can you replace with steel or stainless. The boat dealer closest to me does not stock these nuts...
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    2003 Tritoon w/4.3 Vortec Prop Question

    Need some prop help. I bought a 23 foot 2003 Odyssey Tritoon w/4.3 190 H.P. Vortec v-6 I/O last fall. Its had at least (2) owners so some history is lost. It has a 15 x 19 Solas S.S. prop and I?m only showing 4000 rpm WOT. While it seems to run very well for a Pontoon @ this RPM (30 mph), I?m...
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    2002-2003 4.3 Vortec rocker issue

    Need some help here guys. I have a 2003 Tritoon with a Vortec 4.3 I/O. Bought it used last fall and have had it out about a dozen times running about 200 gallon thru it. Last weekend, on Saturday, it ran like a top as usual. On Sunday, unloaded it off the trailer and was idling in the marina...
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