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  1. K

    1986 Mercruiser 170 running issue

    Try running the bilge blower, since a 470 is fresh water cooled it builds more heat under the cover. Also buy a new rotor for the distributor. Just to be sure you can try having the engine cover open before you start to pull the kids. If you are using ethanol based fuel it could be the fuel...
  2. K

    Need help finding part number

    Those numbers are not the correct ones. Those might be a production date code. 982226 is the # for an empty gear case. This will fit on your boat. What is the gear tooth count of your original housing? What is the gear tooth count of the housing you purchased?
  3. K

    Need help finding part number

    Do you know the difference between high and low profile upper gear housings? All Ford 351 upper gear housings were low profile. All upper housings before 1972 were high profile. There were some V8 Chevys that were high profile all the way to 1977 before the 400-800 series where all the drives...
  4. K

    1986 gimbal housing, gimbal ring, bellhousing, outdrive swap on to a 1968

    As Bondo said you will need to use everything from the engine back. I think the 470 flywheel housing will bolt to the 160. The SEI drive should work out ratio wise. If the SEI has the longer driveshaft it should connect to the engine. The front mount will be further forward Some early 160...
  5. K

    Stringer boot recommendations?

    OMC #313080. Sierra # 18-2767 is what you need. With some liquid soap or KY the boot can go over the drive, just remove the trim tab exhaust outlet which helps.
  6. K

    SX-A thread repair

    3/8x16” is the thread pitch. NAPA should have a Helo coil kit. Just to be sure thread the plug on a 3/8x16“ nut.
  7. K

    250CI MerCruiser Question

    Try with a test light or volt meter connected to the + of the coil and spin the engine, there should be full battery voltage in cranking mode only at this point. Also on the distributor side of the coil disconnect the wires and just reconnect the wire that goes to the distributor. If the...
  8. K

    1977 Ford 460 ignition

    You may have a marine distributor. You probably have a Prestolite distributor. If that is what you have points and the condenser are the same as Chrysler parts before they changed to electronic ignition. Also if the distributor does not have a vacuum advance on the side then it should be a...
  9. K

    Fuel tank suction tube removal

    That skin stuff you saw is common in older fuel systems. Sometimes it looks like very fine hair. The screen in the suction tube has to come out. The crazy part is if the gas in the filter tube is dried out you will be able to blow through it with your mouth, but with gas it will cause a...
  10. K

    yamaha 3.0 l4 blew head gasket help!

    Be sure to seal the head bolt threads with #2 Permatex or similar compound. Torque the bolts to 100.
  11. K

    5.7 Gi engine alignment woes

    Set me straight here, did you place the large flat washer over the studs then placed the engine on top of them? I hope not but if you did that then that is the problem.
  12. K

    5.7 Gi engine alignment woes

    I guess that since you have experience with Mercruisers you know how to swivel around the alinement bar inside the gimbal bearing. With the engine raised enough try completely removing the adjustable engine mounts to give more range of movement that may allow the alignment bar to engage the...
  13. K

    Manifold/riser 3.0 mercruiser

    Remove the spark plugs, disconnect the hose on the thermostat that leads to the manifold. Put the male end of your garden hose inside the hose turn the water on and let the water flow through the manifold. Spin the engine with the starter a few times, if the manifold is leaking water will...
  14. K

    Identifying my mercruiser gimbal housing and ring

    It will not be compatable with a V6 or V8 application. It will work with a 2.5 and a 3.0 as well as the style engine you have. The main difference is the centering boss that protrudes where the driveshaft comes through and centers in the inner plate.
  15. K

    5.7 Gi engine alignment woes

    Try using an engine hoist attached to the front of the engine and the front mounts with the nuts bottomed out. Then raising and lowering the engine while to get the alignment bar to engage the splines. I feel your pain as I have had a few that really tested my patience. If you do not have an...
  16. K

    4.3 diesling

    Also check that the throttle closes all the way and the idle speed is at the correct rpm.
  17. K

    Fuel pump issue

    Another place to check is the small filter in the carburetor inlet.
  18. K

    Fuel pump issue

    Where the fuel line is attached to the tank there is a fitting with with a check ball this is the anti siphon valve. Also a good time to unscrew the main fitting with the suction tube. Inside the tube there is usually a very fine mesh filter which needs to be removed and blown out, it is...
  19. K

    Not so good vibrations ,1989 4.3 liter Cobra

    You should have changed the gimbal bearing. If water got into the joints it is in the bearing also. There is a good chance water is in the drive unit also
  20. K

    Starter

    Stern drive engines are standard automotive rotation CCW. This is the engine’s rotation when viewed from the flywheel end. CW engines are usually in straight shaft inboard applications.
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