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  1. K

    Upper Gear Housing Swap

    Any low profile gear case from 73 to end of production will interchange. If just the water pump housing is freeze damaged then the case should be still good.
  2. K

    Upper Gear Housing Swap

    You will just have to play around with propellers but it should work. The gear ratio on the 140 case is around 2; 1 and a the 165,170&190 were 1;8 so you will have to go at least 2” more. Does the replacement have the same internal steering gear?
  3. K

    Partial Power... Part of the Time!

    I had a similar problem with the Donzi. After chasing a non existent fuel problem and even with the Mercruiser Rinda scanning tool which would show no problem codes I replaced the plugs. I went to NAPA and asked for the most expensive plugs available. The boat had been in storage with just 30...
  4. K

    Sudden high rpms, loss of speed, smooth engine, not the prop..

    Just have someone push the throttle wot and be sure that the carburetor butterflies goes all the way open and stays, not trying to start closing. If you ever watch the way the control works on the back side you will see what can happen. It just depends on who rigged the boat and set up the...
  5. K

    Sudden high rpms, loss of speed, smooth engine, not the prop..

    My favorite tried and true method is to by pass the tank with a 6 gallon outboard tank. That method usually narrows down the problem.
  6. K

    Sudden high rpms, loss of speed, smooth engine, not the prop..

  7. K

    Sudden high rpms, loss of speed, smooth engine, not the prop..

    Make sure that the throttle is opening the carburetor all the way and not “over stroking” which means the throttle goes all the way at one setting and if it goes further it starts to slightly to actually pull the carburetor off of WOT. Under most situations the description points to a wrong...
  8. K

    Sudden high rpms, loss of speed, smooth engine, not the prop..

  9. K

    Removal of AQ170 engine.

    After the engine is removed and if it turns out that the PDS shaft is rusted into the flex plate then the only way it can be removed is by using a 1” hole saw and cutting a hole in the outer perimeter of the flywheel housing to gain access to the bolts that mount the plate to the flywheel. If...
  10. K

    Tilt/Trim backwards

    If the original hydraulic one still works just keep using it until it quits then start using the “ear muff” one.
  11. K

    Volvo Penta SX-A drive U-Joints

    Sierra marine #18-2174 should be the ones you need. If the “C” clips are inside the yoke.
  12. K

    OMC 120HP suddenly backfiring when accelerating

    Try the 6 gallon outboard motor tank trick. Connect it to where the line from the tank is connected to the fuel filter. Of course be sure that the filters are all new including the one that may be in the carburetor inlet fitting.
  13. K

    Tilt solenoid issue or bad wiring?

    Sierra Marine #18-5812 grounded base is what you need. Probably worth the time to replace them both. OMC # 985063 from Crowley Marine.
  14. K

    No Plane, Low RPM'S

    Check the fuel rail with a magnet. The first Volvos with fuel injection had steel fuel rails that will rust inside and the particles will get into the injectors. Later models have stainless rails. If you cannot get ethanol free gasoline that can cause some problems.
  15. K

    Tilt solenoid issue or bad wiring?

    Cleaning everything is a good start. If the problem persists then you will need to replace the relay. If it has only 3 terminals then it is a grounded base relay. If there are 4 then the other small wire is the ground and it is not automotive.
  16. K

    1972 OMC 225 Tilt not working

    It may be possible that the tilt motor could be some of the problem. The brushes may be either stuck or worn down and not contacting the commutator and arcing which also eats up the segments. The motor is Sierra # 18-6754. Also 18-0917 gasket. A short 3/8” 12 point box end wrench is the best...
  17. K

    OMC 120HP suddenly backfiring when accelerating

    When you have a timing light pointing at the marks, does the timing marks hold steady when the backfiring through the carburetor happens? You did not mention replacing the spark plugs, are they new?
  18. K

    Velvo penta does on water

    To make things a lot easier how about converting to a Petronic ignition kit. Sierra marine # 18- 5289. Easy to install and no more points/condenser to worry about.
  19. K

    1972 OMC 225 Tilt not working

    The Iwo came here to New Orleans for Mardi Gras in 93 and I got to go on board with my son and was able to take him all over the ship. The guys in the boat shop told me about the upcoming de commission. We went to Norfolk for it and had dinner with the Captain who was on it when I was. I...
  20. K

    1972 OMC 225 Tilt not working

    Oh a Deck Ape! I was on the Iwo Jima from 1-66 to 1-69 then 2-69 to 8-69 on the Sedgwick County 1123 , snipe EN2. We performed logistics supporting the PBR boats in the Mekong Delta rivers that spring through summer in 69. Our home base was Vung Tau then. Remember seeing the NJ a few times...
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