Search results

  1. Z

    4.3L Water Circulation Diagram

    Hi, I have a Mercruiser 4.3L V6 #0M676089 Does anyone have a diagram of the water circulation? I am getting water in the oil. The boat was winterized and I haven't even run it long enough yet to have circulated the anti-freeze out of the block. Does anyone have a diagram of the water...
  2. Z

    Water Circulation Problem - 5.7 raw water cooled

    Hi all, Recently I dropped a new 5.7 vortec long block in my boat. Was out the other day doing some testing and tuning and the starboard riser got so hot that it ballooned and melted the exhaust coupler on the y-pipe (also the flapper is gone- I presume it has melted/fallen down). Water was...
  3. Z

    New 5.7LX No Start, Backfire/Sneeze

    Good evening, what started out as a smooth operation has turned into an extremely frustrating endeavour. I need some outside counsel before I lose all my hair. I bought a boat with a blown motor - a 5.7 LX non-vortec with a 4 bbl carb. I replaced it with a 5.7 long block with Vortex heads. It is...
  4. Z

    Ski Locker Hatch Trim

    Hi all, just picked up a new project. A 98 Maxum 2300 SR. The item giving me the most difficulty is the ski locker hatch. It is missing. I can easily build one out of wood or a composite (HDPE comes to mind) but the problem I run into is I don't have an aluminum trim ring, which is what...
  5. Z

    Oil Pressure Issue - 4.3

    Hey all, I've got an oil pressure problem with my GM 4.3 Vortec (96+). I recently dropped in a used motor into my boat. Hooked it all up and fired her up. Started up fine, good oil pressure, just needed to be timed and idle adjusted. Ran for 10 mins at fast idle then shut down. Went back next...
  6. Z

    Which Coil - External or Internal Resistor?

    I've got an 2001 Mercruiser 4.3, I think it is Thunderbolt IV ignition system (only ignition control module on exhaust manifold, no knock control module). Can someone confirm the coil that I need? I believe it is a 12V internal resistance type coil that I need. My friend gave me a 12V external...
  7. Z

    4.3 Marine to Auto Block Swap

    Hey all, I've got a 4.3 ('01 vintage) Mercruiser with a cracked block. My plan is to swap it with a block from a Blazer or Jimmy of the same year. I'd pick up one of those SUVs, remove motor, scrap car. I will leave the internals in the auto block, and swap everything else. Cam, heads...
  8. Z

    Potential Bow rider purchase - a few q's

    Hi all, Looking to buy a bow rider for the summer. Already looked at a few and they were a major disappointment (and a long drive). Anyway, i have found another that piqued my interest, an 01 Bayliner 195 classic. I asked the usual questions about drivetrain maintenance, interior and floor...
  9. Z

    Gas leaking at carb

    Hey all, I have some more boating woes. Had the carb rebuilt a few days ago, slapped it on the other day, everything ran fine with no leaks. Today, after just starting the engine I immediately noticed fuel dripping out from the inlet to the carb. Any thoughts as to why this would all of a...
  10. Z

    '08 3.0L MerCruiser dies at low RPM. Carb, bad fuel, both?

    Hello everybody, I have recently acquired a small bow rider equipped with a 2bbl carburated 3.0L MerCruiser engine and Alpha One out drive (everything is from 2008). The motor is exhibiting some odd behavior and I was hoping someone may have a few pointers for me. Here's the problem. I was out...
Top