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  1. Scott06

    Prop size

    Probably something like a Michigan Vortex 4 blade 18" pitch would be a good place to start. What is the current SS prop that is on there? just trying to figure out how much grip it will have vs a less expensive AL prop. Also what is the WOT rpm range for your engine. You mention at least 5600...
  2. Scott06

    1990 5.7L L.E. OMC Cobra - Various Questions

    Yes would also agree the fuel line looks factory.
  3. Scott06

    1990 5.7L L.E. OMC Cobra - Various Questions

    Can't tell you about your questions but would look at the Holley carb on it to make sure it is a marine carb. Can grab the numbers of the airhorn or post a pic of the carb. I think normally all Holley Marine carbs have J tube bowl vents that are pretty obvious on if flame arrestor is removed...
  4. Scott06

    Verify I have found all drain points

    post #1 second paragraph -was working on a stringer now has 2006 Tahoe/ 4.3 MPI
  5. Scott06

    Looking for a different distributor than my crab cat dist.

    Yes, I'm sure you are still happy with your beta max as well... Seriously if you don't mind cleaning and gaping them there is no issue. Its only if you dont know what a dwell meter is that it is a problem
  6. Scott06

    Looking for a different distributor than my crab cat dist.

    On points yes , on thunderbolt the trigger wheel is part of the rotor
  7. Scott06

    Mercruiser 188 Open Cooling System

    Riser drain into the manifolds. Sounds like you got it right as long as you drain and prob. Yes 4 gallons or so in the block
  8. Scott06

    Mercruiser 188 Open Cooling System

    Did you drain the block too don’t know exactly where they are on your ford but will have drain plugs on either side of the block
  9. Scott06

    Mercruiser 188 Open Cooling System

    yes thermostat must be open but if it were me just drain the block and associated systems vs running AF. If really want to do AF to do it right you need to drain it first otherwise too much risk of diluting the AF
  10. Scott06

    Mercruiser 188 Open Cooling System

    there should be block drains on either oil pan rails, drain them there will be some sort of drain plug on bottom of each exhaust manifold drain those, and pull bottom of big J hose on circ pump. Never have done a log manifold as they were before my time but pull the hoses on thermostat and...
  11. Scott06

    Mercruiser 188 Open Cooling System

    Most of the free sites get shutdown for (understandable) copyright infringement. Best bet is to determine what manual number covers your engine and look on ebay for a used copy. this is for the 351 version but I think has the diagram you are looking for . you have to expand the window to see...
  12. Scott06

    Looking for a different distributor than my crab cat dist.

    https://www.ebay.com/itm/155867165235?hash=item244a683233:g:qU0AAOSwCXdlRREI&amdata=enc%3AAQAIAAAA4NXDmm5iHBj3k%2B6y2yJon8dI1%2FdGWNNRGlFf8Pp%2Bb9RfqQx6nGef%2Feqh1jDqna6Jeq%2FzMPMW9eTMopqs3idWUt5i3iB17OsPKe%2B5ygsOh36SowqnFOICMZLH48iozSrDIVTM%2Frk3B97YbpAax3lY63qMx%2FnG2sa6qB8oJcJMB%2BsTQ%2F7TTbG...
  13. Scott06

    Looking for a different distributor than my crab cat dist.

    You seem to hear mixed comments on pertronix componenets. Why not get a used TB distributor as BT suggested? Seems simplest solution Additionally can you just put a nut on the backside of where the thread is stripped? Maybe not the most elegant solution but it cap just has to hold the cap on
  14. Scott06

    Bravo 3 Engine Alignment

    Yes work on the alignment -you should never have to pound the alignment bar in. What do the witness marks of grease look like? that is key to know if you need to move the front of engine up or down. I would look through the gimbal into the coupler as you may have damaged it pounding the bar...
  15. Scott06

    4.3LX & Weber Carb Service

    The fuel coming up and dribbling off of boosters is evidence of float bowl overflowing bad or misadjusted needle and seat/float, or too much fuel pressure. Until engine is running fuel pump should only be running when starter is cranking. Get a good carb kit from a place like mikes carb and...
  16. Scott06

    Bravo 3 loss of lube oil - slowly then rapidly x2

    Would also check input shaft seal is not leaking lube into the bellows and eventually the bilge
  17. Scott06

    Can’t Figure out Prop ….

    On my sea ray 170/3.0 I used to run michigan vortex 4 blades- 16” for skiing, 18” for everything else. both really worked nice for the price.
  18. Scott06

    1986 Mercruiser 470/170hp/3.7L Carb backfire, low vacuum, other weird issues

    what about it is not rebuildable? Willing to bet that with some guidance you can properly rebuild it. anyone here who says they haven’t re-rebuilt a carb is FOS… my success rate improved by getting a ultrasonic cleaner from harbor freight used it with both carb cleaner and also simple green in...
  19. Scott06

    1986 Mercruiser 470/170hp/3.7L Carb backfire, low vacuum, other weird issues

    That is on old holley power valves not Rochester derivatives. the newer holley power valves are not susceptible to backfire damage anyways .
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