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  1. M

    No Spark – 1998 MerCruiser 5.7L Thunderbolt V Ignition

    So I actually tapped the white with green stripe wire from the interrupt switch to the same colour wire going from the distributor to the ICM and it was shifting perfectly fine. Whether that had something to do with the no spark issue or not I’m not sure but inward able to shift out of gear...
  2. M

    No Spark – 1998 MerCruiser 5.7L Thunderbolt V Ignition

    I disconnected the grey wire from the coil negative terminal (tach wire) as well as disconnected the tach from behind the helm and still no spark. I did run through all those tests and it seems like the ignition module is the culprit. A mechanic that’s done this before, told me to convert to...
  3. M

    No Spark – 1998 MerCruiser 5.7L Thunderbolt V Ignition

    Hey Everyone, I’ve been restoring my 1994 Bayliner 2452 for the last two years (new transom, new stringers, new fuel tank etc) and my mechanic finished his part this week. He rebuilt the Alpha One Gen 2 outdrive and swapped my old 1994 5.0 MerCruiser (1,800HRS on it) for a 1998 5.7 MerCruiser...
  4. M

    Can I replace my 1994 Mercruiser 5.0 2BBL (305) with a 1998 5.7 2BBL (350) ?

    I made my mind up and just made a deal with the seller, so 5.7 it is! It's got a 2bbl not a 4bbl unfortunately. Is it a matter of simply replacing the intake manifold/carb or are there other things needed to convert it to a 4bbl?
  5. M

    Can I replace my 1994 Mercruiser 5.0 2BBL (305) with a 1998 5.7 2BBL (350) ?

    Thank you everyone for your very helpful and informative replies! So the 1998 5.7 that I found is a complete unit, meaning its got all the bolt-on's/accessories (alternator, carb, exhaust & intake manifolds etc.) so it's ready to go as soon as it's in the boat.
  6. M

    Can I replace my 1994 Mercruiser 5.0 2BBL (305) with a 1998 5.7 2BBL (350) ?

    I have a 1994 Bayliner 2452 with a 5L mercruiser/alpha 1 gen 2 outdrive which went on me (likely head gasket) and I am wondering if can swap it out with a 1998 5.7L while keeping the same outdrive. I had the boat for 2 years and it always felt under powered (a lot of people with the same...
  7. M

    1994 Mercruiser 5.0 carb'd/thunderbolt ignition, popping and banging after a while

    Hello everyone, New to the forum here. Purchased a 1994 Bayliner 2452 which has a mercruiser 5.0/alpha1 last October. The boat sat for about 3 years before that. I changed the engine oil (Mercury 25W40), oil filter, fuel filter & spark plugs and it ran fine on the first couple outings. Last...
  8. M

    1994 mercruiser 5.0 carb’d started ticking

    Hello everyone! I bought a 1994 Bayliner 2452 with a carb’d 5.0 mercruiser a few months ago and just used it for the first time a couple of days ago. The boat sat for about 3 years before I bought it but it fired up and ran pretty good. On my first day I replaced the leg oil and fuel water...
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