Search results

  1. Scott06

    Overhauling my 1988 MerCruiser 4.3 ltr. engine

    Its to keep hot oil off the underside of the intake runners. I wouldnt put something that can drop rust or pieces into the engine. Either take it off or replace it. I suspect you can grind the rivets off and run without it just fine
  2. Scott06

    Alpha One - Stainless Upper Steering Pin or Not?

    Post a picture if there is no wear where the steering lever clamps on and the shaft seal surface is clean and nit pitted u can reuse it. i think some of the stainless shafts may be problem prone I've heard good things about the ones from NuWave marine in nj , i think they are like $100.
  3. Scott06

    Replace or Repair, where to start?

    Hopefully Im steering you straight. I had a hell of a time first time putting and outdrive on because it kept popping out of gear, that maybe what is happening here
  4. Scott06

    1992 Bayliner Cuddy 3.0 Mercruiser

    I ran two different pitch 4 blade michigan vortex aluminum props on mine (sea ray 170/3.0 engine) 16” for skiing, 18” for cruise and tubing. Was a really good value in an upgrade, they were like $125-150 each.
  5. Scott06

    Fuel burn with 5.7 LX mercruiser, 24' Boat

    On a 383 spinning to 5800 and warmed over id do the 750 Cfm 1410 the OP with a stock 5.7 600 cfm/1409 is fine. I found better results with my idle transition on my 1409 fattening up the idle mix a bit. Best idle was fairly lean. i did goto a bigger accelerator pump nozzle that cured a bog in...
  6. Scott06

    Plug gap and Compression

    You are likely just fine as AD lays out. Likely with a warm engine before doing the test your numbers will come up a tad, but if its running fine dont worry about it. biggest issue you may run into from an over heat is blowing a head gasket you would see water in the oil.
  7. Scott06

    Replace or Repair, where to start?

    This is the intermediate shift shaft you are looking at the bottom of it in the center of photo 1 . look on top of the cavitation plate this should be facing forward when the controller is in fwd, check its not bent and properly engaging shift mechanism hanging off bottom of bell housing. Make...
  8. Scott06

    Cracked spark plug porcelain-timing?

    Normally with detonation you will see specks of metal aluminum from the pistons on the insulator. if they are present likely detonation is happening i wouldn't add initial timing. Boats are under different loads and more detonation prone than other motorsports, hence marine applications use way...
  9. Scott06

    Replace or Repair, where to start?

    Before anyone yells at me for posting another site i tried to find the parts drawings here on iboats but they come up as no parts available with no drawings .... http://www.boatparts.ca/mercruiser/upper_gear_case.html number 43 is the intermediate shift shaft which is held in the upper with a...
  10. Scott06

    Plug gap and Compression

    As pointed out 150 is new . Usually you want to be above 125, when it gets down to 105 or so you have a dead cylinder. were these done with a hot engine? Does it run ok or are you hunting down issues ?
  11. Scott06

    Replace or Repair, where to start?

    With an r, mr , or alpha gen one drive when you split the halves of the drive you need to make sure the lower is in fwd and the shift arm in the upper is facing fwd when you out the two halves together. there is a short splined shift shaft sticking out of the lower, i think you need to turn it...
  12. Scott06

    Merc 4.3l timing question, BTDC mark

    Correct but there is on a TB5. Wasnt sure if you were just pointing out diff between 4 and 5, not sure if OP specd a year or ignition system, just wanted him to be aware of the need If he has EST or TB 5
  13. Scott06

    Merc 4.3l timing question, BTDC mark

    You re just seeing the timing light adding and removing ten degrees of advance hence why it goes to 10 BTDC with no advance in the light, and zero with ten degrees advance. mist stock balancers have only TDC and what ever base timing is. So you use an advance light to program in ‘X’ advance...
  14. Scott06

    2nd wiped Camshaft OMC 460

    yes Its possible. When you change out to positive seals you need to machine the valve guides down so the seal will fit. If you just put a seal on top of the cast in boss i would suspect you have seal to retainer interference , could be hitting the inside if the spring as you are likely using a...
  15. Scott06

    1992 Bayliner Cuddy 3.0 Mercruiser

    Dont take any bs for buying a bayliner, they are a cheap way to get on the water. Older ones didn’t hold up too well hence the chop busting. They have the same mercrusier engine as many other boats so mechanically the same. on a boat of this age you need to be concerned about wood rot in...
  16. Scott06

    Uhhhh

    Check spark strength with something like this...
  17. Scott06

    Is my 77 Inline 6, 250 CID, 165 HP a GMC or a GM Chevy

    that was the point trying to clarify info for the OP not confuse him ...he has a straight 6 not a V6
  18. Scott06

    2nd wiped Camshaft OMC 460

    Did u machine the guides on the heads for the positive seals? Sounds like you have some mix and match parts tough to tell what was done previously. if i recall on ford 429 and 460 heads the pushrod length is changed to account for any machien work like milling the heads etc? Might want to look...
  19. Scott06

    Is my 77 Inline 6, 250 CID, 165 HP a GMC or a GM Chevy

    And starting to stink...
  20. Scott06

    Mercruiser 350 and Alpha One Gen 1 - maintenance recommendations?

    Thats a good list but i would add this - Pressure test the drive. This will tell if any seals are leaking id do the plugs, check the wires, also check cap and rotor. carb rebuild id look at the fuel for any contamination if clean see how it runs, rebuild if you have stumble or other running...
Top