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  1. Scott06

    est ignition on a 1989 4.3 liter cobra.

    You need a way to get 12 v when key is in start position and 12v when key is in run position. Don't have a wiring diagram but I suspect you will need the wire coming off the starter solenoid to get 12 v to + side of coil during cranking, and take 12v from upstream of where resistance wire was...
  2. Scott06

    Leaking toons

    I would knock the toons with a pick hammer to see where else on them is so badly corroded. it is most likely that the rest of the toon is just as corroded and you have nothing to weld to. probably hard to see unless you get the layers of bottom paint off. as outlined above if someone used the...
  3. Scott06

    Manifold/riser condition

    It must have been a freshwater boat with no build up of scale like that. I boat only in fresh and thats what my manifolds look like. i would run a file over the surfaces so check them for flatness and reassemble with good gaskets like oem merc or Barr
  4. Scott06

    Can Larson Senza be fixed?

    This sounds like some of the convos my teenager has ... thats shows a lot of experince...you better stop betting you cant afford it
  5. Scott06

    Can Larson Senza be fixed?

    Since you threw your hat in the ring, Maybe you should learn what you are talking about too… if you want to do those things feel free, but spinning on starter will accomplish the same thing. In fact this was recommended by the engine supplier when i repowered my boat a few years back. I thought...
  6. Scott06

    RE: Issues with Mercruiser 5.0 LX 4 Barrel Carb

    Unplug the shift interrupt switch if it wont start . You may have adjusted it to where it is now tripping the swtich qnd cutting off the ignition. Had a hung up shift swivel arm … tried to adjust the cable onky to have it not start…
  7. Scott06

    I assume I need an engine alignment, vibration when drive is engaged

    So this is happening on land then ? One thought is maybe gimbal or u joint has rusted during lay up but would think these would be the same neutral and in gear. Wondering if they forgot the thrust washer on prop I know you said prop is fine but real easy to check drive with prop removed With...
  8. Scott06

    5.7 GM Marine Repower Options?

    If you can do the work yourself, spend the money to get new base engines (long blocks) i went through the same exercise as you seven years ago. Bought a extended base engine from Michigan Motorz ( carb intake distributor) has worked flawlessly for seven seasons. Glad a went this route. of course...
  9. Scott06

    Can Larson Senza be fixed?

    Not maybe … yes done it many times. Please learn what you are talking about. will circ oil the same way with no load on internals.
  10. Scott06

    Can Larson Senza be fixed?

    Take out spark plugs spin on starter with distributor wires unhooked, you have same thing .
  11. Scott06

    Rochester 2gv

    So this was after putting spring on pump back in?
  12. Scott06

    RE: Issues with Mercruiser 5.0 LX 4 Barrel Carb

    Stop buying non oem water pump parts way too many issues with them.
  13. Scott06

    I assume I need an engine alignment, vibration when drive is engaged

    On an alpha drive the driveshaft and shafts in drive are turning with exception of prop shaft when engine is running. Would start with prop to see if it is rubbing and installed correctly. Run dive with out prop on it to see if it vibrates with out prop Possible other things are going on. It...
  14. Scott06

    Rochester 2gv

    Yeah that’s the same idiot who screws up my projects … only see him in the mirror otherwise hard to find….
  15. Scott06

    RE: Issues with Mercruiser 5.0 LX 4 Barrel Carb

    On the not pumping of water. Would check that impeller vanes are not spinning on center hub, common defect seen with cheap aftermarket pumps. The oem merc pumps last a long time dont waste money on anything else. Verify the key that locks impeller to shaft is in place, as its easy to miss when...
  16. Scott06

    Rochester 2gv

    Cup should be tight fitting against sides of pump well. not sure what you mean by 3/4” if diameter of pump well sounds right.
  17. Scott06

    Rochester 2gv

    Somewhere thee is a pump rid height adjustment spec for the accelerator pump lever position vs the top of carb bowl. Ill see if i can find one.later mercarbs that are an evolution of the 2 jet have three holes in pump arm to adjust-shot volume. you might be a tad rich but i would suspect that...
  18. Scott06

    Bravo 3 anodes and mercathode

    Yeah they added a second round one to the later bravo 3 because of the corrosion issues seen on the early B3s. they can corrode inside the prop hub where bearing carrier goes in and housing cracks. Happened to a friend of mine in northern Chesapeake which is slightly brackish water. His is slip...
  19. Scott06

    Sharrow prop

    So how many have you bought? Sharrow props not outboards....
  20. Scott06

    Sharrow prop

    Lighten up Francis …
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