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  1. Scott06

    Speed Plateaus at 5200rpm

    What 3 blade 21" prop is on there now? I had a big diff in top speed switching between a Vensura and Revolution 4 - both 4 blade 21" The Rev 4 has so much better bite that I could fully trim up and gain 3-4 more mph top speed. Downside was that hole shot was better with the Vensura as the...
  2. Scott06

    Power Trim Control Panel

    May have just replaced the shifter what I had on my 91 boat looked like this one...
  3. Scott06

    Power Trim Control Panel

    Like like a standard merc shifter Normally the up button has two detents, first one is trim up to the limit...push it in deeper to second detent for trailer up ...if the trim limit switch is broken only the trailer up will work as trim will think its at the limit already ... What year is the...
  4. Scott06

    Making engine beds

    Tie into side stringers
  5. Scott06

    Making engine beds

    Here is a 4.3 Vortec engine install dwg https://samerwebapp01apncus01.azureedge.net/mmgw-env-b/filer_public/40/ba/40ba8060-54af-487e-9186-4ce3dfaead13/43lefialpha_1996-2001.pdf shows location of mounts etc. not sure if you will need to remove the original front mount
  6. Scott06

    Engine swop ? about Timing

    If you are happy with it leave it alone, especially if it is coming out In a couple months Less timing has less detonation potential. You changed the whole engine so might have been loss of compression valve sealing etc or prob with old ignition
  7. Scott06

    Engine swop ? about Timing

    When ever you are mixing and matching parts, you have to work through somethings…. You want enough advance to produce power without causing detonation…would think start with a total advance around 24, see how it runs then advance it 2 or so degrees at a time. watch for detonation And wouldn’t...
  8. Scott06

    Engine swop ? about Timing

    you may want to read this thread - guy went to a delco est and had lower total advance and was down on power. Seems the older piston and head combo may need more advance than the delco est has- I think is limited to about 24 total...
  9. Scott06

    alpha 1 gen 2, 3.0 outdrive on 4.3

    If you look in sea rays owners resources you will find the following info - for prop chart https://owners-resources.searayweb.com/propeller-charts-files/2006%20Sport%20Boat%20Sport%20Cruiser%20Prop%20Chart.pdf If yours is 190 hp carb vs the 220 hp mpi - and came with a 1.81 with a 23" prop, so...
  10. Scott06

    Can you change from welded to bolted?

    Didn't catch that thanks. Depending on use yeah prob wouldn't fix it either.
  11. Scott06

    Can you change from welded to bolted?

    What is the age of the trailer - is it aluminum or galvanized? what's the condition of tires brakes wheel bearings etc - what else do you have to repair? How much are the cross members? Would figure $100-125 each. While you could bolt them up I cant imagine it costing much to have them welded...
  12. Scott06

    alpha 1 gen 2, 3.0 outdrive on 4.3

    What size boat is it in? If, if the boat had acceptable performance with say a 17" or 19" prop, then you could step up to a 19" or 21" and it would probably work just fine. If it is a smaller boat, like two of my neighbors have (tahoe Q5) w a 4.3 and a 1.81 drive that needs a 23" to keep rpms...
  13. Scott06

    Engine swop ? about Timing

    I would match the intial (in base mode) and total timing of what it should have been on the 88 engine. Thinking match the timing curve for the head you are using. Of course when you mix and match components some trial and error may be needed…it is normal when you take it out of base mode that it...
  14. Scott06

    Ignition sensor help

    Are the bullet connectors male and female ? I think the oem ones are so they cant be mixed up. This is shown in this photo of an oem sensor https://www.michiganmotorz.com/thunderbolt-ignition-sensor-kit-v6-v8 if you are not in a rush i would return it and get an oem sensor
  15. Scott06

    Ford 302 pinging

    the difference between 8 and 10 intital timing wont be that significant, would suspect that is a red herring and something else is going on. Given what you saw in the fuel tank would think poping top on carb would be in the nest step
  16. Scott06

    Ford 302 pinging

    Would think either rebuild or replace the carb or go back to 8 deg BTDC
  17. Scott06

    Ford 302 pinging

    So no more pinging? You had verified fuel contamination and may have to clean out the carb would be my first thought (unless you did clean it already) other thought is to watch with a timing light see if things advance or if there is a miss. On my Edlebrock I had a little bit of play in the...
  18. Scott06

    Ford 302 with mc-1 outdrive

    Prop hub or coupler ? although I dont think they would reset...are you using the older style pressed in prop hub? possible it kicked out of gear. I don't have enough experience to tell you how to diagnose if the drive isn't staying in gear under load, some others on here do...
  19. Scott06

    Ford 302 pinging

    That’s perfect if it holds close to that at wot you are good
  20. Scott06

    Gimbal bearing/bellows?

    I would remove the drive and inspect the gimbal on u joints. Usually the gimbal growls less when worn if drive shaft is straighter vs up? I wonder if something is rubbing or u joints have a bad spot. when u say cost to replace do u mean parts or taking it and having the repair done. replacing...
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