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  1. Lou C

    5.7 omc stalling while shifting

    Not really but if the centrifugal advance in the distributor isn’t working that could do it. Sometimes it’s a combination of problems causing a problem like that
  2. Lou C

    OMC 5.7. Totally frustrated

    You should really set the dwell with a meter, I use a remote starter switch with the cap off and that is faster. Set dwell, set timing and set idle in that order. idle is a little high, 630 rpm
  3. Lou C

    5.7 omc stalling while shifting

    well now that you know how to adjust it you can retard it slightly and see if that affects that noise, like from 8*-->6* see if that helps. The issue is the more you retard it the more power you lose. So I run mine right at the spec of 6* for the 4.3 and run high octane gas. A lot of people...
  4. Lou C

    5.7 omc stalling while shifting

    You might want to get a mechanics stethoscope they are great for tracking down noises
  5. Lou C

    Bad Experience with Mercury and Bass Pro.....

    did they register the warrantee with Mercury? that's what I'd want to know right away we bought a Suzuki DF 2.5 from a dealer and the trouble we did have was covered under warrantee.
  6. Lou C

    5.7 omc stalling while shifting

    check fuel mixture, inspect spark plugs look at center electrode insulator, are they blistered white, if so fuel mix may be too lean I would also check total timing advance. Use premium gas no matter what it says in the manual What is your engine temp? Should be 160-175
  7. Lou C

    5.7 omc stalling while shifting

    Right and if you hear a ticking noise it could be pinging which isn’t good. Might have to adjust fuel mixture & make sure the accelerator pump is working. Fuel mix might be too lean. I use at least 89 and at the gas dock they only sell 93 octane. I know the marine engine companies say 87 is ok...
  8. Lou C

    94 Cobia 5.7 Chevy/Yamaha setup

    No way. No parts no support no deal
  9. Lou C

    5.7 omc stalling while shifting

    Try the 15x13 & see what you get
  10. Lou C

    5.7 omc stalling while shifting

    It is true that if you prop for heavy load and then run lightly loaded you can come close to or even exceed the redline. Given that your WOT rpm is too low right now it’s not that likely though. Mine is propped to hit 5,000 with just me aboard so if I’m loaded it’s still at the spec of...
  11. Lou C

    5.7 omc stalling while shifting

    Post a pic of where your fuel line connects to the tank
  12. Lou C

    5.7 omc stalling while shifting

    That’s a huge boat for a lil 5.7. Should a had a 454! The valve is where the fuel line from the pump connects to the tank
  13. Lou C

    One manifold hot (5.0)

    I actually tried going from a 160 to a 140. Found condensation in the manifolds so went back to the 160. When I had the heads off 5 years ago found no evidence of salt build up in cooling passages
  14. Lou C

    Boat swamped, let's see if we can get it running...

    Let me take this moment to mourn the loss of the supremely reliable mechanical fuel pump on late model Vortec engines….I replaced one…after 30 years….for $80….I can get either the OE Carter or Sierra for either price. In fact if I repower with a V8 I am thinking of going with a Pre...
  15. Lou C

    5.7 omc stalling while shifting

    That’s hard to say really. You might need a 15x13 for that boat. What’s the length & weight? Looks big in the pic! My 20’ Four Winns weighs about 4200 lbs when I had it weighed a lot more than I thought. It didn’t perform well with the 14.5x19, wrong for the V6, better with the 15x17, but the...
  16. Lou C

    5.7 omc stalling while shifting

    a couple of points... 1) if you have an advance timing light for setting base timing at idle speed (the advance timing light can be used to check base timing as well as total timing advance) make sure that the dial is set to zero, or else it will throw off you timing setting 2) check your idle...
  17. Lou C

    5.7 omc stalling while shifting

    That’s basically it, you will need a crowfoot wrench to reach the bolt for the clamp that holds down the distributor so you can loosen it to turn the distributor
  18. Lou C

    5.7 omc stalling while shifting

    post 48 above OMC Cobra shop manual
  19. Lou C

    5.7 omc stalling while shifting

    Now check with the dwell meter, set timing & idle speed
  20. Lou C

    Taking boat into salt / brackish water

    yep this is easier for me.... than this...
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