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Thread: Jippe's wetback 10

  1. #1
    Team Member
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    Default Jippe's wetback 10

    My wetback 10 & yamato 302 (+headless driver)
    Top speed 59 mph last summer, measured with gps. (no airtraps and poor quality bottom paint)
    More pictures and videos on youtube

  2. #2
    Sam Cullis Mark75H's Avatar
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    Thumbs up

    Keep working, there is more there!
    Since 1925, about 150 different racing outboards have been made.


  3. #3
    Team Member F-12's Avatar
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    Default Wow!

    You finally found a way to race without a helmet! Somehow, someone will make a rule to strap it on your butt..............
    Charley Bradley


  4. #4
    Team Member DeanFHobart's Avatar
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    Default Cool

    Very nice..... install air traps and front deck cowl. The deck cowl in front of the dash board will make the boat look better.... and look finished.

    With the air traps you should get over 60 mph for sure.... without any prop change. Then prop work will and raising the motor will get even more. Keep the prop shaft at least 1" below the bottom of the boat for safety. The older designs were not designed for jacking up the motor to the max. Also, the prop shaft should be level with the bottom of the boat to start with. Maybe kicked out just a little.

    Really cool..... keep up the good work.

    Good Luck.
    Dean Hobart

  5. #5
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    Default yamato 302 spark plugs

    Hi,

    Is there any alternatives for NGK R8102-10, R8108-10 or R7424A-9?
    They are hard to find...

  6. #6
    Team Member zul8tr's Avatar
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    Default 302 plug alternates

    go to Rick Montoya site and look under technical, I think there is a link on this site but for sure on hydroracer.net. The 18mm are hard to find so if you have that head you can change it to the 14mm head or use 18mm to 14mm adapters and then use 14mm plugs. There are many of those available. Ric suggests to go 1 heat range colder with the adapters compared to what was in the engine with 18mm plugs.

  7. #7
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    Default

    I have 14mm head and R7424A-9 spark plugs, they came with engine.
    Manual says R8102-10 or R8108-10.

    It is very hard start on cold. Spark plugs get wet all the time.. I have to let it idle ~15s. then pull the choke again 2-3s. and idle ~15s. etc. If I touch throttle plugs get wet.

    Any ideas?

  8. #8
    Sam Cullis Mark75H's Avatar
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    Default

    That's not being caused by the spark plugs. Check something else
    Since 1925, about 150 different racing outboards have been made.


  9. #9
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    Default

    Now it works like a champ (after three days pulling and cursing, no idea what was wrong)

    Today, first time, I drive trough wave and get really wet

  10. #10
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    Default

    How long airtraps should be? Do I made them full length or less?

    I have Dewalds prop, is there way find out proc specs?

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