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  1. Dubed

    Stingray mercruiser 3.0 engine problem

    I had something similar happen on my 3.7. Just died no explanation, turned over but sounded and felt odd. I took the distributer cap off to check the points and distributer wasn't turning when turning over the motor. Turned out the key on the crank sheared so timing gears weren't turning. It was...
  2. Dubed

    3.7 to 4.3 swap

    Found a good donor motor and stripped down to bare block. Machine shop started the machine work then the parts will be swapped from the rebuilt motor. Next time I take this motor out of the boat, it will not be going back in!
  3. Dubed

    Just thought I'd share a nice photo.

    Beautiful!
  4. Dubed

    3.7 to 4.3 swap

    What benefits would there be from installing that aluminum head on the 3.7? Just similar expansion/contraction and less weight? Or is there a performance value beyond that?
  5. Dubed

    3.7 to 4.3 swap

    Hahaha! No problems. I just hope to return to this thread when I find a good donor boat and continue with the tons of questions I'm sure I'll have!
  6. Dubed

    3.7 to 4.3 swap

    So you guys hijacked my thread and turned it into a "mine is bigger than yours" thread. I was looking for advice upgrading from the 3.7. I think a 4.3 would be perfect but certainly have not ruled out the 5.7. I think the outcome of this decision will be dictated by the donor boat. I will leave...
  7. Dubed

    Wonder if I should go IO again or go OB?

    Yes it's not a packing gland
  8. Dubed

    3.7 to 4.3 swap

    I have done the alternator conversion, electronic ignition, eliminating the old water cool regulator and other issues. Bigger problem is not being able to find the exhaust components. Fact of the matter is, this motor is just no longer completely supported. I just spent a ton of money rebuilding...
  9. Dubed

    Blowby through vent tube? Mercruiser 3.7

    Thank you
  10. Dubed

    Blowby through vent tube? Mercruiser 3.7

    One quick question. I'm getting a donor block for my 3.7 that the machine shop can bore to match and replace my failed block with. Will any 470 / 3.7 block work? I believe the blocks were all the same throughout production
  11. Dubed

    3.7 to 4.3 swap

    Where I spend most of my time fishing is usually the sweet spot between the boat staying on plane and dropping off plane, any faster and the sea will beat the snot out of me. Where I could use more power is in the bay and rivers however when we go outside that extra weight would offset my...
  12. Dubed

    3.7 to 4.3 swap

    Thanks guys! You've given me loads of information to dwell on and managed to confuse the crap out of me at the same time...🤔 I think a good vortex 4.3 would suit my needs and give me better weight distribution, be a bit less cramped in the engine bay, better fuel ecomy (huge plus right now)...
  13. Dubed

    3.7 to 4.3 swap

    Awesome. Will keep that in mind. If I get a donor boat pre-96 and just buy a reman vortex long block, everything else will be good? Except the intake will be different?
  14. Dubed

    3.7 to 4.3 swap

    Thanks! Out of curiosity, any particular reason 96 and up? What changed?
  15. Dubed

    3.7 to 4.3 swap

    Thanks everyone for your guidance. I guess the big decision would be 4.3 or 5.7. I cant imagine why a 4.3 wouldn't be a good choice, take up less room for easier maintenance and a bit lighter. Given that a 190 hp 3.7 pushes the boat fine (would like a bit more when hauling 4 people and gear...
  16. Dubed

    3.7 to 4.3 swap

    Wow! I was reading your thread last night. Quite the journey you recoerded there. Thank you for sharing. There a lot of hands on info there.
  17. Dubed

    3.7 to 4.3 swap

    Really? That's hard to imagine. Doesn't the 3.0 only push out 130 hp? And I thought it was pretty weak in the torque dept?
  18. Dubed

    3.7 to 4.3 swap

    Yep I get that. Not enough ponies, won't push this boat
  19. Dubed

    3.7 to 4.3 swap

    And I believe the boat weighs around 2500 lbs without the engine. I don't think they offered a 6 cylinder back then because not enough ponies
  20. Dubed

    3.7 to 4.3 swap

    I realize the mounts aren't there and need to be glassed in. The V8 230hp was an option so u was thinking the engine bay was set up for either option. Does that make sense? And thank you!
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