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    Motor Mount Bolt Size

    I am missing a bolt for the front motor mount. short of pulling one out, does anyone know the size and length?

    Thanks
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    5 hours of break-in in the books, 2 more to go....

    5 hours of break-in in the books, 2 more to go. No problems so far. Oil down less than half a quart. Topped it off. No leaks, all seems well.

    Engine sounds a bit different than the old one. Can't...
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    They put 15 40 in it. I just heard it run at the...

    They put 15 40 in it. I just heard it run at the shop and should have it in the water on Thursday.

    I'll look at my owners manual and see what it says for initial break in. The engine builder says...
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    Break in procedures for rebuilt engine

    New block, new heads, valves. Bearings were in good shape as were pistons. New rings etc.

    What is the recommended break in time? My former partner in the boat broke it in last time and if I...
  5. Thread: Spark Knock

    by SkiBoy
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    Problem found

    Small crack in the block was found between 4and 6 on the right side, as well as a missing piece of the head gasket. No scorching of the cylinder walls from leaking gasses but the damage is done....
  6. Thread: Spark Knock

    by SkiBoy
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    Had two new mechanics listen to the boat...

    Had two new mechanics listen to the boat yesterday with timing advanced to factory settings. Both said bad camshaft.
    They will tear down top half and see what else needs to be done. I'll report...
  7. Thread: Spark Knock

    by SkiBoy
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    Thanks. I have gotten the same response on...

    Thanks. I have gotten the same response on another forum. I hope it isn't ruined, but it may be. I used the boat for two months after the initial spark knock. We turned down the timing until the...
  8. Thread: Spark Knock

    by SkiBoy
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    Just wondering if anyone thinks it could be a...

    Just wondering if anyone thinks it could be a leaking head gasket between cylinders? No oil is leaking from outside gaskets.

    Idle was fine for the last few weeks. No change or jump in idle...
  9. Thread: Spark Knock

    by SkiBoy
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    I understand. I hope to get a compression test...

    I understand. I hope to get a compression test done and then a leak down on any cylinders that are weak. I too think a rebuild is in order. Just hoping to get through the last 60 days or so of...
  10. Thread: Spark Knock

    by SkiBoy
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    I have not run a computer diagnostic yet. I have...

    I have not run a computer diagnostic yet. I have a CAR MD unit, but there is no where to plug it in. (that I can see) The computer is under the steering wheel and dash.

    The boat is idling much...
  11. Thread: Spark Knock

    by SkiBoy
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    I turned the fuel up on the primary. (on both...

    I turned the fuel up on the primary. (on both sides,one full turn) Had more power and held speed better. (slighter knock at take off ) Mechanic does not think the chain has stretched, but we may...
  12. Thread: Spark Knock

    by SkiBoy
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    New plug wires are on. I found a set of Indmar...

    New plug wires are on. I found a set of Indmar on E-Bay for $35. No change in how it runs, slight knock still there on start up. Mechanic will come out on Monday to ride and listen while I ski. ...
  13. Thread: Spark Knock

    by SkiBoy
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    I'll let you know what happens next. Thanks for...

    I'll let you know what happens next. Thanks for all the help so far.

    I looked at a timing chain today on a similar boat engine that threw a rod. He opted for a new engine instead of a rebuild. ...
  14. Thread: Spark Knock

    by SkiBoy
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    Found another arc in one of the plug wires. New...

    Found another arc in one of the plug wires. New wires will be here Wednesday or Thursday. Hope that will help the problems.
  15. Thread: Spark Knock

    by SkiBoy
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    Carb is no longer leaking air. It settled down...

    Carb is no longer leaking air. It settled down the idle issue a bit. I advanced the timing and the knock came back. We are now thinking it's the timing chain as well. Thanks for the info and...
  16. Thread: Spark Knock

    by SkiBoy
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    Good call. I checked the two gaskets under the...

    Good call. I checked the two gaskets under the carb by spraying carb cleaner and there was an air leak. When we took off the carb there was carb cleaner under the gaskets. One gasket hadn't even...
  17. Thread: Spark Knock

    by SkiBoy
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    Thanks for the info. We found a bad spark wire...

    Thanks for the info. We found a bad spark wire tonight. (number 7) It was loose and shocked me when I tried to lift it off. The spark was coming through the black boot when I wiggled the wire on...
  18. Thread: Spark Knock

    by SkiBoy
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    We have done that under load and it had to be...

    We have done that under load and it had to be retarded to stop the knock. I advanced it a bit and it was all good, I advanced a bit more and the knock came back, so I retarded it again. Bottom line...
  19. Thread: Spark Knock

    by SkiBoy
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    Mechanic could not make it out today. It will be...

    Mechanic could not make it out today. It will be Monday before he can get here. Any suggestions that could help me out? Thanks
  20. Thread: Spark Knock

    by SkiBoy
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    Yes, we will use a timing light. Will update...

    Yes, we will use a timing light. Will update after tomorrows testing.
  21. Thread: Spark Knock

    by SkiBoy
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    Oil pressure seems fine. Knock is non-existent...

    Oil pressure seems fine. Knock is non-existent now due to the retarded timing. The mechanic will advance it tomorrow under load until we hear knocking. The knock was consistent when I was having...
  22. Thread: Spark Knock

    by SkiBoy
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    It's an electronic distributor. I just went down...

    It's an electronic distributor. I just went down to see the mechanic that has been helping me and he asked about any play in the distributor. I'll check it. maybe the modules are bad or the whole...
  23. Thread: Spark Knock

    by SkiBoy
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    800 hours, and yes I do ski a lot. I live on a...

    800 hours, and yes I do ski a lot. I live on a small lake in central NY and usually I'm on the water from early May to Late October, skiing 3-4 times a day, on the average 5 days a week.

    This...
  24. Thread: Spark Knock

    by SkiBoy
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    I changed the cap and rotor but did not check the...

    I changed the cap and rotor but did not check the distributor itself. Not sure how to check the advance weights. Any hints?

    The motor was idling poorly all year, and now it fluctuates from 850...
  25. Thread: Spark Knock

    by SkiBoy
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    Thanks for the reply. From top to bottom: ...

    Thanks for the reply.

    From top to bottom:

    Too much compression - I used Sea Foam to clean carbon deposits in the fuel and poured it directly on cylinders, as per instructions.

    Advanced...
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