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  1. Scott06

    Long cranking after sitting 1-2 weeks Mercruiser 4.3

    Carb bowl can dry out during sitting. Fuel pump doesn't run to refill bowl until starting cranking, unlike injected engines where fuel pump primes when you turn on the key.
  2. Scott06

    3.0 lx merc plug question

    Parts book lists (depending on engine year) BPR6EFS or equivalent - 1996 and up BR6FS (1990-95) or equivalent you should be able to cross ref to other manufacturers, cant tell up about the LTSM you ask about
  3. Scott06

    Alpha one gen II growling noise when turning

    Getting to be a long thread apologies in advance if this has been has been covered... Did you run it without the drive to see if noise is still there? I'm assuming it won't be but easy to rule out... I think you were left with checking the input driveshaft bearing or upper until bearings...
  4. Scott06

    Converting to carburetor from mpi 350 mag

    In addition to manifolds, carbs, throttle brackets, fuel pump & lines, I suspect you will need a carbed wiring harness and ignition system like TB V or delco est. This may make the ecu replacement look less expensive than it feels now… i assume lightning strikes arent covered by insurance...
  5. Scott06

    Trim

    As Scot said your relay is clicking and pulling in but contacts are not working, so you have two issues the up solenoid needs replacement your trim limit switch needs to be reinstalled and adjusted to cut off trim when the cylinders are a certain length (find it in manual), that is why trim...
  6. Scott06

    4.3L Mercruiser Milkshake

    Thats what i also thought so yiu should be ok with that coupler for earlier engine. that is backed up by the parts digram listing the different couplers for early and later models shows studs and hardware sizes to hold coupler to crank vs later flywheel attachment...
  7. Scott06

    Running boat on land with no prop?

    This probably says more about the muffs you are using than muffs vs a tub. As others have pointed out u want to ensure your tub has the drive well covered in the water you are probably 6-8 more water above what you have pictured here
  8. Scott06

    4.3L Mercruiser Milkshake

    I think yes but you may want to verify with a place like Michigan Motorz
  9. Scott06

    4.3L Mercruiser Milkshake

    You only need the earlier two piece rear main seal coupler and maybe a different starter this coupler works with the earlier two piece rear seal https://www.michiganmotorz.com/mercruiser-hub-style-coupler-1985-earlier Starter - there are only two chevy patterns (regardless of engine...
  10. Scott06

    WOT RPM too high. Where is the slip?

    Didn't catch that you are correct. If RPMS are verified then you are down to prop damage or coupler
  11. Scott06

    WOT RPM too high. Where is the slip?

    A 2000 would have a replaceable hub prop - I dont think they tend to slip like the older pressed rubber hubs Would verify the prop is ok and hub not slipping, also run with hatch open to see if there are signs of coupler slipping.
  12. Scott06

    Stupid mistake: Can it be fixed?

    I would drain it out, take starter and alternator off open clean and dry them. They may work may not. If you have a local starter alternator repair place may be worth taking to them drain oil - you can likely suck the water off the bottom of the pan and change the oil /filter Once you get it...
  13. Scott06

    WOT RPM too high. Where is the slip?

    You said returning to the slip - have you verified prop is not damaged and hull is clean and not waterlogged?
  14. Scott06

    4.3L Mercruiser Milkshake

    Two piece rear main seal = need a diff coupler
  15. Scott06

    4.3L Mercruiser Milkshake

    I bought a handyman's special (sea Ray 200 sport) with a known cracked engine block so I never ran the boat with the 4.3. I did some calcs basically lb of boat/hp and realized that it would be the same as my old boat (17 ft /3.0 which was lacking) so I put back in the equivalent of the largest...
  16. Scott06

    4.3L Mercruiser Milkshake

    Looks good. If they engines are similar vintage the coupler should swap over no issue. I did a 4.3=>5.0 swap was able to use most of the peripherals off the 4.3 with exception of exhaust, needed manifolds, riser elbows and down turn elbows to match up with wye pipe. You will need to go up in...
  17. Scott06

    Drive oil

    As Lou Said that is Premium Gear Lube which is clear brownish yellow in color. The High Perf gear lube is bluish green, can't confuse the two. While it used to be spec'd for the older alpha one gen one (1990 and older) Premium lube is now labeled for outboards and jet pumps 75 hp and lower. I...
  18. Scott06

    1984 228 305 carb problem

    driver quality resto, also did all the work myself (which shows…), needs another paint job that one is from 1992…
  19. Scott06

    WOT for 20min and engine bogs.

    Here is the TB troubleshooting guide https://forums.iboats.com/threads/how-mercruiser-thunderbolt-ignition-systems-work.676476/ but as Scott outlines figure out if it is fuel or spark first, have you taken off fuel filter and dumped contents into a jar look for anything but clean gas yes the...
  20. Scott06

    Drive oil

    Merc/quicksilver High Perf gear lube onky comes in SAE 90 weight , no way to get the wrong one… walmart usually has it at best prices
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