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  1. K

    Power Trim Control Panel

    I have to agree with Scott. Most likely the control was up graded in the past.
  2. K

    Power Trim Control Panel

    Probably the lower toggle switch was the trim control which was wired through the trim limit switch on the gimbal housing. The top button is probably the trailer button for full tilt. Sylvan probably cut corners and did not use the genuine Mercruiser control that has the trim/tilt controls on...
  3. K

    Power Trim Control Panel

  4. K

    Volvo Penta AQ131A & 275 OutDrive

    There are 2 areas on the drive that could be the problem. The hose fitting mounted on the suspension fork will rot off allowing air to get into the water stream. The other is the “O” ring that seals the lower gear case to the mid section allowing air in also. Sierra # 18-2777 Or Volvo#...
  5. K

    What is this?

    Definitely a MPI model engine that was connected to a stern drive. Probably in the 430 HP range. Looks like the model of engine that was in the Donzi I had.
  6. K

    New Carb conversion issues 5.7

    Do you think that there is a restriction between the fuel pump and the suction tube in the tank? Were you having a fuel starvation problem before removing the fuel injection?
  7. K

    New Carb conversion issues 5.7

    With the engine running what is the voltage at the + or bat side of the coil? How much fuel pressure is at the carburetor?
  8. K

    Raw water pum

    Try setting up a bucket of water in the boat with the suction hose directly in the bucket. Or just plug in a garden hose to the suction side to see if it will pump the water.
  9. K

    Excess vertical play in intermediate shift shaft? Alpha1G1

    There is supposed to be a stainless flat washer on the top of the shift shaft bushing. This washer holds the brass intermediate shaft up so that it stays engaged in the bottom of receiver under the bellhousing. You will have to drop the lower to add the washer.
  10. K

    Mercruiser 5.7L warm start challenges

    How many idle mixture screws does it have? The Rochesters have 2 and the Mercarbs have 1. Personally I never cared for the Mercarb.
  11. K

    Mercruiser 5.7L warm start challenges

    Before re-starting the hot engine remove the flame arrestor and look if the choke is closed and as SD suggested look down the air horn to look for fuel leaking. Also connect a volt meter to the + or bat side of the coil to measure the voltage when the starter is engaged. There should be full...
  12. K

    Ford 302 pinging

    All 188s came only with Holley carburetors. Someone may have taken the adapter from a 233 which only came with Rodchesters atop the Holley pattern adapter that mounted the Rodchester.
  13. K

    What do I check next on overheating issue?

    If every thing suggested checks out then you probably have a case of “Bravoitis”. This is a phrase that the Donzi and other sport boat owners call it. From the age of your drive you may be getting exhaust gasses if your exhaust exits through the drive. Also there may be a foreign object in the...
  14. K

    Ford 302 pinging

    The anti siphon valves are threaded into the 90* elbow on top of the tank fuel outlet. Have you ever checked to see if there is a small cylindrical filter inside the tube that goes into the tank? There is a good chance that there is one, you need to remove the tube and make sure to remove it.
  15. K

    Ford 302 pinging

    There were 2 types of anti siphon valves. Aluminum and brass. The aluminum ones have given problems in the past. The brass ones are the better ones. If your fuel pressure gets low at full throttle that could be the source. Try to have the 6 gallon tank ready to switch over when you run the...
  16. K

    3.8 OMC replacement motors?

    The cheapest easiest thing for you would be to find a 3.8 from a junk vehicle and rebuild it with a new set of manifolds. Finding a complete running 4.3 from a Mercruiser/ Volvo package is possible, it just depends on what part of the country you are at. Just like SD said about the drive...
  17. K

    Ford 302 pinging

    Just for kicks, get a 6 gallon outboard tank filled with 91-93 then run it wide open to see if the pinging is still present. The original 302s came with Holley carburetors. The 302s were rated at 225 with a 4 barrel Holley. Try to find a good iron manifold from a Mustang, Comet or Fairlane...
  18. K

    Ford 302 pinging

    In regards to the power valve spring, if there ever was water in the float bowl that caused the spring to rust then it will be weakened and will result in a lean out at full throttle.
  19. K

    1976 Mecruiser 351W Trim System

    Just a suggestion. The “O” rings can be had at any auto store by matching them up. When the valve block is off put a straight edge across the bolt holes, most times the block is not flat. Just take a file and some Emory cloth to restore the flat surface.
  20. K

    1976 Mecruiser 351W Trim System

    You got it. The line on the left goes to the “out” port on the reverse lock valve. Then it goes to the block on the bottom of gimbal housing.You just need the female 1/8” npt to 3/16” inverted flare plumbing fittings for the 3/16” inverted flare nuts. You could restore the low pressure...
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