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  1. Lou C

    1992 Mercruiser 4.3 w/ balance shaft and 1 piece rear main seal swap to newer year Vortec.

    Standard 5.7 is about 270 or so hp so no prob with the Alpha
  2. Lou C

    1992 Mercruiser 4.3 w/ balance shaft and 1 piece rear main seal swap to newer year Vortec.

    If you have the room in front it can be done 3.5–>4” longer. You will have to use V8 manifolds, elbows are probably the same and rejet the carb to allow for the greater displacement so the engine doesn’t run too lean. Also your top speed won’t be as high as it could be due to the 4.3 gear ratio...
  3. Lou C

    1992 Mercruiser 4.3 w/ balance shaft and 1 piece rear main seal swap to newer year Vortec.

    Rick are there any other mods to be done if you are putting Vortec heads on a non balance shaft block (but with roller cam)? Pushrods rocker arms etc? Though of doing this when I did my top end overhaul but thought there was more to it so I just replaced the old heads with reman pre Vortec heads...
  4. Lou C

    1992 Mercruiser 4.3 w/ balance shaft and 1 piece rear main seal swap to newer year Vortec.

    Yes the exhaust manifolds will work and the carb should as well, you will need a Vortec intake manifold (8 bolts vs 12).
  5. Lou C

    Mercruiser 4.3 cracked intake manifold

    Those gaskets (Vortec style) have a plastic base and a rubber style sealing ring, they also have locator tabs that fit into holes in the cyl head so you don't need sealer for them, unless you have pitting/corrosion around the water ports on the cyl heads. I think yours looked pretty clean. On...
  6. Lou C

    4.3 GXI - 2007 blowing hoses off

    Here's a schematic of the OMC/Volvo thermostat housing design, if that bypass port clogs you can see how pressure delivered by the impeller can build up and put pressure on the hose from the impeller housing to the thermostat housing. Also if they have never been checked it may be time to check...
  7. Lou C

    Mercruiser 4.3 cracked intake manifold

    They do as does Center State engines and others. eBay can be good as well, I found a couple of spares for my old pre Vortec that way and they are a bit harder to find than the Vortec intakes since they haven’t been made in like 25 years! Meanwhile my original still hasn’t rotted out even with...
  8. Lou C

    Volvo Penta 3.0 I/O Overheating. Brand New Engine!

    Love the lines of the classic Four Winns. Glad you’re fixing it and not parting it out. If I can ever find one I’d love a 201 Liberator (same hull as my 88 200 Horizon) with a 383 stroker and thru hull exhaust.
  9. Lou C

    Aq271c Engine wont rev past 2000rpm

    Antisiphon valve on the fuel tank can cause this; had the same problem on my boat a long time ago....
  10. Lou C

    Mercruiser 4.3 cracked intake manifold

    These were marine specific manifolds, not used in auto applications (maybe only in trucks back in the '80s). You will find them on ebay and at places that sell new and reman engines.
  11. Lou C

    Mercruiser 4.3 cracked intake manifold

    Vortec has no exhaust cross over. That's why you have to use an electric choke if you are using a carb. My old pre-vortec has a well type divorced choke that is heated by the exhaust crossover.
  12. Lou C

    Mercruiser 4.3 cracked intake manifold

    Could be. I'm not sure why they changed from the exhaust crossover to the water heated passage but that's what they did. Come to think of it I had a Ford 5.0 V8 back in the '70s and it was the same, intake was heated under the carb by antifreeze. To prevent carb icing.
  13. Lou C

    can someone tell me what motors are in a 1987 28' Chris-Craft 283 Amerosport 262 ?

    see if Chris-Craft has a website and manuals for older models, like Crusader does. The front circulating pump is a standard pump for marine applications for the old Pre-Vortec V6 and V8 (same part). I used a Sierra pump both times I replaced mine.
  14. Lou C

    Mercruiser 4.3 cracked intake manifold

    yep that's it. Nice to have the drain port.
  15. Lou C

    Mercruiser 4.3 cracked intake manifold

    Also if the engine is level when you drain it (as it should be) and you pull the bottom end of that big hose on the circulating pump off, I'd be curious to see if there is any water in the intake if you then pull the plug. First few times I'd do both! Even after pulling the block drains...
  16. Lou C

    Mercruiser 4.3 cracked intake manifold

    be careful with the intake gasket and make sure you use the correct torque specs, there were some mistakes in manuals on this because the pre vortec took like 30-35 ft lbs but the vortecs are much lower like 10 or 15, you have to check, or else you'll be back where you started (water in the oil!)
  17. Lou C

    OMC 5.0 Part ID?

    Well: call around and see if there are still any shops who know how to set up an OMC Cobra shift cable, this is one of the main issues with them. I can do it, I have the special tools and the knowledge, but younger guys working, may not. also, if you take the boat out make sure there is no...
  18. Lou C

    Swapping Internals From Marine to Auto Block (piston rings, bore size questions, etc)

    The only way you can do that is to measure everything, or take it to a machine shop and have them do it for you. It depends on the wear in the donor block vs the components from your cracked block. Likely is that you need an oversize bore oversized pistons & rings, who knows what else. I...
  19. Lou C

    OMC 5.0 Part ID?

    The 94 and up Cobras are the same as a Volvo Penta SX of the same year. For the older ones, yes some parts are hard to find. I've been able to keep mine going but I have a lot of spares. But old Bayliner, OMC Cobra power, really just save your money. Keep saving till you can get something much...
  20. Lou C

    Buying a used boat anxiety-talk me down.

    boat looks like new. Congrats! I priced out a Four Winns HD2 (20' little shorter than my old one) with a Mercury 150 outboard. Appox 48000 brand new but I bet it could be bought for less. As much as I like Chevy small blocks though I want only outboards from now on. I can't deal with the...
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