Search results

  1. Scott06

    Merc Alpha4 no longer available. What to replace it with?

    https://www.ebay.com/itm/184839585859?epid=21005710659&hash=item2b094c4043:g:y28AAOSw47VgoE~M not sure what your defintion of cheap is...especially considering shipping down under.
  2. Scott06

    Merc Alpha4 no longer available. What to replace it with?

    I had 20 % slip with a vensura on my boat, but the slip allowed better holeshot as the engine would get in its power band sooner. chris seeing your results which mirror mine with vensura, you will really want to try a revolution 4 17” at some point. I lucked out and found an essentially new one...
  3. Scott06

    Pitch

    I wouldnt buy a prop until you verify current wot rpm. Current number will inform your need fir pitch Assuming your current prop is in the recommended 4400-4800 rpm range at wot, then go with a 17 or 18” pitch 4 blade if you want more holeshot. Going down in pitch will give more power on...
  4. Scott06

    Pitch

    What is your current prop and rpm do you get at WOT.
  5. Scott06

    Prop Blade/Pitch/RPM

    What was the WOT RPM with the 21"/3 blade? I would think a 19" 3 blade or 18" 4 blade like a michigan vortex would put you where you want to be
  6. Scott06

    Water Pump Question - Alpha 1 w/Closed Cooling

    Ball valve closes off the opening in the Y so you can flush it from the drive with fresh water or run it on muffs on the trailer , otherwise water pumped up from drive impeller will just push out of the water intake port. if the block never saw raw water you are good with closed cooling...
  7. Scott06

    Water Pump Question - Alpha 1 w/Closed Cooling

    Was your 5.7 previously run in raw water for cooling?or is it a new long block
  8. Scott06

    New to Forum / New Boat / Selecting the correct prop

  9. Scott06

    New to Forum / New Boat / Selecting the correct prop

    I would reccomend a 4 blade for what you are doing - heavier load and fairly big boat for the power (22 ft/260hp). My general use is 6-7 people and go out for an hour of skiing,boarding, and then swim. I have found on my last two boats 4 blades work better for all aspects (holeshot, stern lift...
  10. Scott06

    1994 5.7L Weber carb

    One last thing check the contents of the fuel filter for anything but clean gasoline.
  11. Scott06

    1994 5.7L Weber carb

    None of that would affect idle, but those thise jets it would be slightly lean when running on the primaries and very rich when the secondaries kick in in my opinion start with the basics, clean and rebuild the carb, set the float level, go through the ignition components cap rotor plugs and...
  12. Scott06

    Dripping engine block fitting

    You may want to replace the plastic plugs at some point they tend to get brittle from the heat And a bag of 5 cost like $10
  13. Scott06

    New to Forum / New Boat / Selecting the correct prop

    He is saying 19" pitch the diameter is determined by the prop manufacturer so just stay focused on pitch. If you are only turning 4500 with a 17" pitch I would no go up in pitch as that will lower WOT RPM. My thoughts would be to get either your current prop fixed or get to know the boat with...
  14. Scott06

    Under proped with light load

    Ive had good luck with Michigan Vortex 4 blade props. They are relatively inexpensive. Used to run a 16" for skiing and 18" for general use and tubing. I would think an 18" would do pretty good with that boat and engine. 48 mph is about what I would expect with that combo, actually surprised...
  15. Scott06

    Possibly seized motor?

    Pull the drive to make sure it is not the gimbal bearing u joints or drive that is seized its nit uncommon to have water in the bellows, if it sat for 6 years the ginbal and ujoints might be siezed.
  16. Scott06

    WHAT DO YOU HAVE TO. CHANGE

    If your confident it’s the module you can usually buy Thunderbolt ignition modules Used of eBay for around $200.
  17. Scott06

    Mercruiser 4.3L pushes 2400# runabout only 36mph max

    id bet the enertia would have lower rpms than the turning point due to better bite and less slip. if you are only swinging an aluminum 21 “ to 4100 rpm, assuming the tach is accurate, you need more power or go down in pitch. You will only get more speed out of a higher pitch prop if the engine...
  18. Scott06

    Mercruiser knocks but only after 3,000 RPMs under load

    Sounds a lot like this video I saw, and rpm seems to be similar - in the comments owners states it was the head gasket that blew after and overheat. Do you see any evdience of water on the spark plugs
  19. Scott06

    Running without Reverse Gate..?

    The tolernaces between the pump and the gate are fairly large 1/2" or so. Id look at some youtube videos or if you know anyonw with a jetski go look at theirs. It is just a cup that slides down over the oulet of the jet pump. When partially down you basically have even forward and reward...
  20. Scott06

    No water out transom or exhaust

    I had a blade off the impeller break off years ago , blocked the water outlet passage in the pump body in the drive absolutely zero water from the muffs could get past it
Top