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  1. Replies
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    Here in the US the prop shafts are reduced to...

    Here in the US the prop shafts are reduced to 9/16" and shear pin moved closer to prop nut so more available props can be used like 3 blade over the low performing Japan 2 blade. Check rules in Aus...
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    Whippet II is a good choice for the 321 ...

    Whippet II is a good choice for the 321

    https://nybergdj.wixsite.com/nycraft

    If you build do not use fir ply to heavy and will grain check a lot unless fiber glassed then way to heavy, use...
  3. Would you please post issues 1977, 1978 and 1979...

    Would you please post issues 1977, 1978 and 1979 here like others in that decade in link below?

    http://www.boatracingfacts.com/forums/forumdisplay.php?217-APBA-PROPELLER-MAGAZINES

    Thank you
  4. For a 1997 15 hp I thought is was a 15 ci in...

    For a 1997 15 hp I thought is was a 15 ci in displacement, I thought the old ones were the 1950's era 15 cu in engines. Your 1997 engine is 2.38" bore x 1.8" stroke and the total displacement is 16...
  5. The Merc 15 cu in engines (KG4H) that were used...

    The Merc 15 cu in engines (KG4H) that were used to get 50+ had special streamlined quicksilver gear cases with 1:1 ratio and only forward gears and short exhaust mid sections, your service engine...
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    If your rig is light and can get aired out to...

    If your rig is light and can get aired out to reduce the water drag as much as practical the smaller dia higher pitch prop will give the best top end. If you go for fully ventilated with part of the...
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    Mike Great info. Total Tapped CR? Do you...

    Mike

    Great info.

    Total Tapped CR? Do you mean Total Trapped CR? Which I know as cylinder volume above the top of the exhaust port to TDC and is much lower than based on total cylinder volume...
  8. Jeff Like I said not familiar with forged...

    Jeff

    Like I said not familiar with forged pistons or if the 0.005 clearance is what is required for your engine, with forged I have been told warm up is critical so they do not stick.

    Does...
  9. Jeff What piston skirt to wall clearance and...

    Jeff

    What piston skirt to wall clearance and ring end gaps did you use for the Wiseco's? Are these cast or forged? High silicon?
    Not experienced with Wiseco's, don't have a dino and do not hog...
  10. Thread: Marchetti help

    by zul8tr
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    1,699

    Where are the pics? Here are logos scroll down...

    Where are the pics?

    Here are logos scroll down in post to John Schubert TART

    http://www.boatracingfacts.com/forums/showthread.php?18887-Marchetti-Logo&highlight=Marchetti+logo
  11. Replies
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    Great pics. That rocky shoreline looks rough to...

    Great pics. That rocky shoreline looks rough to launch from.
  12. Replies
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    Also share them here

    Also share them here
  13. Replies
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    What great pics and story of you time

    What great pics and story of you time
  14. Replies
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    Welcome, Those are very cool racers. Tell us your...

    Welcome, Those are very cool racers. Tell us your stories and yes to the more pics.
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    Your machinist knows nothing about blind bores I...

    Your machinist knows nothing about blind bores I believe he used yours as a Beta test. What a jerk. Is he local or did you have to mail your block? If local why not bring it back and have him fix it...
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    Jeff Yikes! will there be enough clearance when...

    Jeff
    Yikes! will there be enough clearance when hot at 6000 rpm with some rod stretch?

    The 5 to 10 offset why? He obviously didn't center the boring bar to the cylinder what a jerk.

    "I...
  17. Thread: Marchetti Logo

    by zul8tr
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    2,958

    Contact John here ...

    Contact John here

    https://hydroracer.net/forums/forum/main/general-hydroplane-runabout-discussion/472692-raceboat-other-racing-decals
  18. Replies
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    35,270

    George Never knew that, how tragic to loose...

    George

    Never knew that, how tragic to loose your Dad at such a young age and at a race meet that you were both competing.
    Hope to see you at up coming AOMCI meets.
    Peace to you

    Pete
  19. Replies
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    Next time get a different machinist. Started at...

    Next time get a different machinist. Started at +40 with the bar, not good.
    When I had + 15 over bore work done on my 25ss with my great machinist in Orlando, who is expert with 40 years doing blind...
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    Run lots of oil like 25:1 and make sure the...

    Run lots of oil like 25:1 and make sure the cooling system is in great shape and passages and all areas are free of scale.
    Not good your machinist went 40 without your permission. Does he have lots...
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    Jeff Just because Wiseco has 40 over does not...

    Jeff
    Just because Wiseco has 40 over does not mean that Mercury was willing to go there with there available oversize pistons. As I asked what was the max oversize that Mercury offered back then? ...
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    What is the largest oversize "Mercury" piston...

    What is the largest oversize "Mercury" piston that was available back in 1975 for a over bore job? IMO that would define the max bore diameter with proper skirt clearance included.
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    How is this Swift coming along?

    How is this Swift coming along?
  24. Replies
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    "------sounds like--------"? IMO mighty trusting....

    "------sounds like--------"? IMO mighty trusting. Has he done a lot of blind bores?
  25. Replies
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    Jeff What are the accurate measurements for...

    Jeff

    What are the accurate measurements for bore out of round and taper of your block?

    Depending on your budget and willing to ship the block there is a machine shop here in Orlando that does...
  26. Bearing suppliers that have quality bearings not Chinese

    looking for 6202C3 15mm bore x 35 mm OD x 11 mm thick ball bearings for my Yamato Y80 gear case. They are readily available but not sure of quality since made all over the world. Any leads on...
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    Yep, here are the Foo Ling details Sheet 1...

    Yep, here are the Foo Ling details

    Sheet 1
    http://www.boatsport.org/PDF/fooling1watermark.pdf

    Sheet 2
    http://www.boatsport.org/PDF/fooling2watermark.pdf
  28. Replies
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    I assume by after market you mean fiber reeds?...

    I assume by after market you mean fiber reeds? For your service engine the SS will do very well. Just make sure no pits or other bad spots on them. I am not familiar with the reed set up in your...
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    Thanks all, before heat I tried acetone on a...

    Thanks all, before heat I tried acetone on a cotton swab and several dabs to keep brass head area wet and it softened enough to loosen the tube.
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    Tillotson KC carb question

    Working on a NOS Tillotson KC16A (same design as KC15A and other KC's and KA's). The idle tube on these carbs are secured into the body from the factory with a hard reddish sealant on the threads....
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    Charlton pics: Page 16 lower left Skip Ritter...

    Charlton pics:

    Page 16 lower left Skip Ritter in a BSH Charlton 525F

    http://www.boatsport.org/magpdf/bsv42.pdf

    Page 14 lower left Dutch Stossel DSH Charlton, also page 15 bottom 5 A stock...
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    Yep sad. In addition to for aft restraint need...

    Yep sad. In addition to for aft restraint need orbital launch restraint.
  33. Replies
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    Some put bumpers at the front on these lake...

    Some put bumpers at the front on these lake runner set ups. With race type trailers that are different than what is in this tread the stacking of boats is different to allow tie backs to the trailer....
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    Jim Sent you a PM in response to your PM. Note...

    Jim
    Sent you a PM in response to your PM.
    Note on the steering with tie back cable set up and 3.5" drum the effort to turn will be reduced but will take more wheel arc to go through a defined turn...
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    Look on page 35 for the new for 1958 Swift Big D...

    Look on page 35 for the new for 1958 Swift Big D

    http://www.boatsport.org/magpdf/bsv64.pdf


    Your # UHD11206358114

    Note in the add the serial number UHD112 was a designation for the Swift...
  36. Replies
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    That is a nice restored Swift Big D and looks in...

    That is a nice restored Swift Big D and looks in great shape for the year. I do not know how to interpret the Swift serial #'s. My guess is a later Swift like 57 or 58 with the long front cowling ...
  37. Since Modifiedoutboard asked " Ever wonder what...

    Since Modifiedoutboard asked "
    Ever wonder what a real port map looks like? Need one to run Dynomation Simulation"
    Sounds like he needs a port time or port area map for the program? Doesn't the...
  38. Dynomation Simulation program is for 4 strokes is...

    Dynomation Simulation program is for 4 strokes is that what you are working with ?

    If you want info on 2 strokes port time area map in link below press "Theory" button and go to section 4. for...
  39. Don't know about Yamis Pyramid style reed cages...

    Don't know about Yamis Pyramid style reed cages but the old doughnut Merc reed cages (55H, 44xs, etc) are prepped with pretty course paper in a 90 degree cross pattern (used by Jerry Wienandt racer &...
  40. Thread: 1976

    by zul8tr
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    39,675

    Would be nice to finish the 70's decade!

    Would be nice to finish the 70's decade!
  41. Replies
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    No starts May 15. This link works now ...

    No starts May 15. This link works now

    https://www.mecum.com/auctions/indianapolis-2018/collections/jim-street-estate-collection/
  42. Thread: Old Neal racer

    by zul8tr
    Replies
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    12,897

    Service KG7 will be a slug for you on a 14"...

    Service KG7 will be a slug for you on a 14" transom probably in the 30mph range, IMO not much thrill but a thrill for some I would spend money on a better engine for thrill? If you want closer to...
  43. Thread: Old Neal racer

    by zul8tr
    Replies
    36
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    12,897

    Lots of answers here and many preferences, most...

    Lots of answers here and many preferences, most use the expensive West System epoxy that has several resin and hardener types available . I have used several including West. I like the simple 1:1 mix...
  44. Thread: Old Neal racer

    by zul8tr
    Replies
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    12,897

    Did that earlier and NADA just did it again and...

    Did that earlier and NADA just did it again and WALA will review it, TKS
  45. Thread: Old Neal racer

    by zul8tr
    Replies
    36
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    12,897

    My Google search, not available for a read just...

    My Google search, not available for a read just purchase
  46. Thread: Old Neal racer

    by zul8tr
    Replies
    36
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    12,897

    Dutchman Patch

    Finally got the computer to cooperate with uploading pics that failed yesterday, Ron Hill helped, thanks. Here are the Dutchman patch pics I did on my 4mm ocume hydro deck.

    Pics came out of order...
  47. Thread: Old Neal racer

    by zul8tr
    Replies
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    12,897

    With a short boat 8'-8" it is limited on the...

    With a short boat 8'-8" it is limited on the engine that will work. You mention KG7H (1952 - 1953) and 20H (1954 -1956), 20H more expensive of the two. The KG7H being older would be the better choice...
  48. Thread: Old Neal racer

    by zul8tr
    Replies
    36
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    12,897

    Dutchman Patch

    Here is a Dutchman patch I did on the 4mm Okume deck of my hydro.

    #1 is cut out the bad area, shape of cut to suit
    #2 provide support for the Dutchman patch, I preferred just strips epoxy glued....
  49. Thread: Old Neal racer

    by zul8tr
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    12,897

    Skip the polyurethane used on floors, it is...

    Skip the polyurethane used on floors, it is labeled for interior use on the can and will not be good for that race boat.
  50. Thread: Old Neal racer

    by zul8tr
    Replies
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    12,897

    Your welcome About at 6am this day I posted...

    Your welcome

    About at 6am this day I posted about a Dutchman patch with pics how I did it on the thin 4mm plywood deck of my hydro. Also described the varnish I use which is Minwax Helmsman Spar...
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