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  1. K

    Ignition wiring question 72 350

    Take a close look at the starter solenoid, the wire on the 3 o’clock terminal is the by pass that feeds the coil with 12 volts when cranking, it could be possible that the battery cable is contacting the small terminal back feeding the ignition. Look closely at the wiring diagram on the far...
  2. K

    Ignition wiring question 72 350

    I can feel your pain. 72 was the last year OMC used the hard plastic harness connectors that were prone to cause bad connections. Even if your ’s is the round rubber style just the age of the wire‘s insulation has to be the root cause, it is probably crumbling if you just touch it. The...
  3. K

    350 Mag / Alpha One / Gen One water transfer tube

    The adhesive should do the job.
  4. K

    oil pan gasket

    Was the bushing for the lower distributor shaft also replaced? It is located just above the oil pump. If it is worn and not replaced it causes the point gap/dwell & timing to not hold steady.
  5. K

    oil pan gasket

    Summit felpro # 17952 shows the gasket if you order the gasket and it does not match what you have they have a good return policy.
  6. K

    350 Mag / Alpha One / Gen One water transfer tube

    The grommet that seals the tube to the housing is actually a shock absorber bushing. You must have a V8 engine that has a 1” water supply hose going to the engine. Leave it in place and be careful when you re connect the engine side hose that the clamp for the hose is centered over the large...
  7. K

    oil pan gasket

    Felpro #17953 available from Summit or from some others if you just google the part #
  8. K

    Mercruiser 3.7 (470) wont turn all the way

    First with the piston down in the cylinder try to raise the umbrella valve seal with a small scribe or screwdriver and spray some penetrating oil over the valve stem. Get a brass flat punch and hold it over the valve stem then tap the punch with a hammer to see if the valve will move. If it...
  9. K

    Harmonic Balancer bolt thread/size for removal.

    It is definitely 3/8” 16 . Try to get a tap that size to clear the threads if you can. If possible get a 1/2” 20 bolt at least 2-3” long to help reinstall the balancer along with some 3/8” and 1/2” flat washers.
  10. K

    Santa brought me Smart Tabs.

    2Xs with AD on removing the Doel tabs. I had a customer who broke one side of the cavitation plate when he went over a large wave.
  11. K

    Mercruiser ECM replacement?

    Just a question, has the fuel tank ever been by-passed with an outboard 6 gallon outboard tank?
  12. K

    Mercruiser ECM replacement?

    Fuel injection is the best thing going for automobiles. I have a 1967 Ford XL that was a 390, I installed a 32 valve fuel injected 4.6 from a 98 Lincoln MK8 that was water damaged and converted it to a Mustang Cobra format doing all the wiring, plumbing, hydraulics and using all engine emission...
  13. K

    Mercruiser ECM replacement?

    Thanks AD, it is getting to a point that if owner’s cannot get a replacement ECMs more and more of these engines will have to convert to a carburetor/ distributor.
  14. K

    Mercruiser ECM replacement?

    Correct me if I am wrong but what if the switch which is on the shift linkage that certifies that the drive is fully in gear is not closing wouldn’t that also prevent the engine from full RPM? I also realize that the engine may just be in protection mode.
  15. K

    Mercruiser 3.7 (470) wont turn all the way

    You may have a stuck valve. Remove the valve cover, loosen all the rocker arms and then try turning it. That will narrow down where the problem could be. Maybe Santa will bring you some good luck!
  16. K

    228 oil pan/timing cover leak

    The 1 piece gaskets that have metal slugs to prevent over tightening are the best and all the major gasket manufacturers make them. The timing cover was never painted under the harmonic balancer so it should be also replaced also. Try to run the engine on the stand before re installing to make...
  17. K

    Just won't start anymore

    Also look under the instrument panel and touch each wire terminal to check for a loose terminal connections at the gauges and ignition switch.
  18. K

    Old ford 302 no spark

    AD, I had forgotten about the way the “Y” blocks set the timing, however every Ford since that style lines up with the marks @ 12 & 6 o’clock crank to cam. The Ford “Modular” OHC engines are a whole new game.
  19. K

    Setting the timing

    Make sure that the machine shop replaces the bushing in the block for the lower distributor shaft above the oil pump.
  20. K

    Frozen Prop on SX-M Duoprop, Seeking Advice

    3Xs with AD & SD. Have some vice grip pliers handy to handle the propeller when it starts to move. I once heated a Mercruiser stainless prop and the rubber expanded causing it to shoot off by it self. After the prop comes off hopefully you will be able to peal the rubber off then probably...
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