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  1. Replies
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    Sticky: Then...why is the exhaust on the right side? Is...

    Then...why is the exhaust on the right side? Is the photo reversed?

    "Inquiring minds want to know!"

    Jeff
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    Sticky: What is that? Exhaust on the right hand side? ...

    What is that? Exhaust on the right hand side?

    Jeff
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    Thanks! Happy Thanksgiving to all! Jeff

    Thanks!

    Happy Thanksgiving to all!

    Jeff
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    Thanks. I guess a little loose is best for...

    Thanks. I guess a little loose is best for racing.

    Jeff
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    Piston to wall clearance question

    I'm having an early Merc triple bored out .030 over and need to tell my boring dude what clearance I want.

    Looked in my genuine Merc manual and couldn't find it. Anyone have a spec?

    Thanks,
    ...
  6. Found a local guy in Lothian, MD who sounds like...

    Found a local guy in Lothian, MD who sounds like he knows what he's doing.

    Thanks all!

    Jeff
  7. Thanks. I'll keep him on the list. I'll ship a...

    Thanks. I'll keep him on the list. I'll ship a piston to whomever does the work so he/ she can fit it.

    Thanks!

    Jeff
  8. Need a Good Place to Get a Block Bored Out

    Anyone near the Chesapeake Bay/ Easton/ Baltimore area know of a good closed end block boring outfit? I need to get an old Merc triple bored out.

    Thanks,

    Jeff
  9. Replies
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    I don't blame you! I've seen two photos of...

    I don't blame you!

    I've seen two photos of boats that launched OVER the roof of their towing vehicles!

    Jeff
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    Gotcha. Thanks. Jeff

    Gotcha. Thanks.

    Jeff
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    If I can ask a really stupid question... How do...

    If I can ask a really stupid question... How do you folks out there, with a similar looking boat as this one, keep if from shifting forward on your trailer? I note that, in this case, there's...
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    Horses and horsepower! A match made in ......

    Horses and horsepower! A match made in ... Idaho.


    Good luck, pardner!

    Jeff
  13. Thread: Skeg mod

    by Fastjeff57
    Replies
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    At least you tried something new, so you and...

    At least you tried something new, so you and others know it wouldn't work.

    Kudoos for doing that, and nice welding work by the way.

    Jeff
  14. 40 mph is not slow! Good work. If my experience...

    40 mph is not slow! Good work. If my experience means anything, you'll pick up 4 to 5 mph with the cav plate at least an inch above the keel.

    Jeff
  15. Not a high speed hull--period. You might want to...

    Not a high speed hull--period. You might want to start looking around for something more appropriate. (Where I boat it's rough as hell, so a deep Vee is the ticket.)
    Your dogs remind me of my...
  16. ..." The flat bottom will beat ya to death on the...

    ..." The flat bottom will beat ya to death on the big lakes around here "

    You said it! Have the same problem where I boat. After moving to MD, I intended to build a tunnel hull until I did some...
  17. You could 'paint stick' the motor higher with a...

    You could 'paint stick' the motor higher with a strip of wood. Long as she's bolted on good it won't be a problem.

    Jeff
  18. Replies
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    Just learned about that little trick (with the...

    Just learned about that little trick (with the light) or I would have used it.

    Motor is now running fine again, on its own. Still suspect the mystery problem will re-occur, but....

    Jeff
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    ..."Boy, the timing belt sure looks loose." ...

    ..."Boy, the timing belt sure looks loose."

    They usually are without the driven pulley!

    ...."...sticking of the throttle advance as well"

    I hand my hand on the distributor body itself as the...
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    ..."I assume not the ADI system because of the...

    ..."I assume not the ADI system because of the incompatibility of the top main cap and trigger system and you have a timing belt."

    You obviously know your stuff! That is exactly why I could not...
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    I meant serious ideas. Jeff

    I meant serious ideas.

    Jeff
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    Calling All Motorheads!

    This SOB of a problem has got me stumped.

    Background: Mark 78 converted to late model electronic ignition. Rebuilt the motor over the winter and fired it up. Motor started instantly, but it was...
  23. Mine also has strakes, including new set, since...

    Mine also has strakes, including new set, since it runs like a submarine--the bow doesn't come up at speed. (I'm working on it!)

    Jeff
  24. Damn but that sure looks like my homemade boat! ...

    Damn but that sure looks like my homemade boat!

    Good luck with her.

    Jeff
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    I suspect the manufacturer deliberately...

    I suspect the manufacturer deliberately restricted the rpm to improve fuel mileage--these things are gas hogs.

    Jeff
  26. Replies
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    Neat, but I have to ask a question: How fast can...

    Neat, but I have to ask a question: How fast can a water jet boat go? There has to be some speed restriction on the jet drive sucking in water to blow out the back, right?

    Jeff
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    That doesn't answer my question, however. Jeff

    That doesn't answer my question, however.

    Jeff
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    What Happened with the 888 Project?

    That was looking good for a while.

    Jeff
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    How about running automatic tranny fluid instead...

    How about running automatic tranny fluid instead of thick grease or oil? Modern manual trannies use it to reduce friction and increase gas mileage.

    Jeff
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    Dingy Bob made me the driveshaft adapter used...

    Dingy Bob made me the driveshaft adapter used with the dual carb, external reeds motor on page one. He does nice work!

    Jeff
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    I've seen snowmobile motors used, bolted...

    I've seen snowmobile motors used, bolted vertically to a tower, but what I've always wanted to run is a rotary engine, say a Mazda two rotor. OMC messed with them years ago and they were fast.
    ...
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    Seeing that's merely an enlarged Super Hurricane,...

    Seeing that's merely an enlarged Super Hurricane, there are lots of mods you can do and they will make a difference. I modified one with external reeds and dual carbs years ago that was a runner.
    ...
  33. Thread: Skeg mod

    by Fastjeff57
    Replies
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    1,952

    I hope you angled it the right direction! Nice...

    I hope you angled it the right direction!

    Nice work.

    Jeff
  34. Dumb question: Do you run the fuel system dry...

    Dumb question: Do you run the fuel system dry after a run? That can cause dripping and make a mess in the carbs.

    Like I said, a dumb question!

    Jeff
  35. I assume you raised the exhaust orts before going...

    I assume you raised the exhaust orts before going to these pistons?

    Jeff
  36. It also has a 10.5 inch wide pad down there (not...

    It also has a 10.5 inch wide pad down there (not visible in the photo).

    Jeff
  37. Don't jump them anymore--too old for the...

    Don't jump them anymore--too old for the impacts--but I sure love to wake surf! Boat is very maneuverable and does that very well.

    Jeff

    PS: Been doing this stuff in homemade 8 to 12 footers for...
  38. That's my thinking as well. Gonna mount it on...

    That's my thinking as well. Gonna mount it on the starboard trim tab, with an extension long enough to always get water.

    Jeff
  39. Relying on water being thrown into it by the prop...

    Relying on water being thrown into it by the prop has not worked for me (at least). Motor overheated very rapidly with the cav plate just under 4 inches up. Was fine at 3 inches up.

    Going to put...
  40. Why not? Instead of flat tops, the pistons could...

    Why not? Instead of flat tops, the pistons could have a mild 'bump' in the middle (like 4 stroke high perf pistons).

    Hope they got made.

    Jeff
  41. ...."it looks like cold workable metal." ...

    ...."it looks like cold workable metal."

    Right! I tried heat and beat cupping a cast Merc prop and....Don't want to talk about it!

    Isn't prop building fun!

    Jeff
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    Year end report: Made some serious progress this...

    Year end report: Made some serious progress this year (though the boat is still a slug--hull dynamics problems). Was able to build two homemade props that allowed running the prop shaft about 1 1/2...
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    Kinda hit the carb bore a bit with the old...

    Kinda hit the carb bore a bit with the old grinder, eh? Too bad, but it shouldn't bother a thing.

    Jeff
  44. Trimming the motor out with the cav plate still...

    Trimming the motor out with the cav plate still running in the water is a major drag inducer--it also tries to pull the stern down. If you need to trim out, try gradually raising the motor until the...
  45. I wouldn't recommend it. Cast bronze is not...

    I wouldn't recommend it. Cast bronze is not malleable and it likes to crack instead of bend.

    Jeff (working on my 8th homemade prop)
  46. Good to see I'm not the only one unafraid of...

    Good to see I'm not the only one unafraid of modifying a prop.

    If you're determined to do this, I'd start small (design A) and see what happens.

    Whatever you do, don't try to heat and beat...
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    I remember those. Some were nothing more that a...

    I remember those. Some were nothing more that a hunk of tube aiming upwards on an angle that bolted to the cav plate. Impressive!

    Jeff
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    Thanks a bunch for your most considerate...

    Thanks a bunch for your most considerate comments.

    Read your post above on your own prop travails and am at a loss as to what I'D do next in your place.


    I'm sure somebody here will give you...
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    Sticky: For heaven's sake don't break this work of art...

    For heaven's sake don't break this work of art trying to get 300 hp! That would be a real tragedy after all the work you put into it.

    I, for one, and damn impressed and would love to see her run...
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    ..."Test, test and more testing." That's...

    ..."Test, test and more testing."

    That's surely what I have been doing, Ron; and relearning what guys like you already know. I too am basically a blacksmith, and damn proud of it! In the old...
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