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Thread: boswell

  1. #11
    PWCToday.com Is My Home Away From Home Mr. Bill's Avatar
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    Re: boswell

    Tim is that kind of guy. Give him a challenge, and he will usually figure it out as he is an excellent mechanic.

    An air jet like that one can be found in many oem carbs for powersports toys and oldler automobiles. I had one in my dirtbike carb 40 years ago. I had them in my Weber 48's for my sand rail. They also showed up in my Delorttos on my street driven VW bug 2180 motor. If I'm not mistaken, they are used in Holley's for hot rod motors. Most are long brass fittings called "air metering jets " and placed directly in the top of the carb. The type you are showing usually stick out the side of the carb.

    There are very similiar jets like that that are not air metering jets. Forinstance, the main jet of the Sea Doo Mikuni round body carbs had a similiar, but smaller overall jet like that where the high speed adjuster is found in an SBN.
    A single carb 587 round body Mikuni from 1988 to 1991 had a #100 fuel jet like that one. The twin carbs had 110's.

    When we used to setup the single carb 38 round bodies for an air filter kit, we put the 110 mainjet into them. For the twin models we used a jet ream to enlarge the 110 to 115 for a filter kit.

    Bill O'Neal
    WCM

  2. #12
    Top Dog jrod928's Avatar
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    Re: boswell

    i spoke with tim yesterday for about an hour, he said that that jet was part of the air metering system on the boswells, he was really knowledgeable about them. He also said that thte current jetting for my carbs is a great starting point for the ski. when my motor is fully assembled I am gonna give him a shout. who knows, i might even send him the carbs to see if he can bring them back to the original boswell design.

    Mr. Bill, is that the kind of jet i can go buy at walts under a mikuni part number, or is it something that will be a pain in my arse?
    95 HX 951 Mod Rossier exhaust, MSD TL, BlackJack 48's, Skat 148
    98 XPL limited COffman, 48mm Novi's, Skat pump 148
    91 X2 Mod 805 HPE, COffman Dry Pipe, Pixy and Unicorn dust

  3. #13
    PWCToday.com Is My Home Away From Home Mr. Bill's Avatar
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    Re: boswell

    That is the kind of jet you may find at a snomobile shop, as Boswell was known more for sleds than pwc's, but who knows, maybe Walt's might carry something like that for an ATV, Motorcycle, ect. I have no idea where to get one.

    Dave works at a huge sled dealership so I would consult him first.

    Bill O'Neal
    WCM
    Last edited by Mr. Bill; 05-04-2011 at 02:25 PM.

  4. #14
    Top Dog jrod928's Avatar
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    Re: boswell

    thanks
    95 HX 951 Mod Rossier exhaust, MSD TL, BlackJack 48's, Skat 148
    98 XPL limited COffman, 48mm Novi's, Skat pump 148
    91 X2 Mod 805 HPE, COffman Dry Pipe, Pixy and Unicorn dust

  5. #15
    PWCToday.com Is My Home Away From Home Mr. Bill's Avatar
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    Re: boswell

    You were thanking me as I was editing my post. Did you re-read it ?

  6. #16
    Top Dog jrod928's Avatar
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    Re: boswell

    do you have a number for dave, that jet goes between the high and low speed jets
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    95 HX 951 Mod Rossier exhaust, MSD TL, BlackJack 48's, Skat 148
    98 XPL limited COffman, 48mm Novi's, Skat pump 148
    91 X2 Mod 805 HPE, COffman Dry Pipe, Pixy and Unicorn dust

  7. #17
    PWCToday.com Is My Home Away From Home Mr. Bill's Avatar
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    Re: boswell

    Sorry, I meant Tim, not Dave. I was thinking about Impros Impellor repair when I wrote that.

    Bill O'Neal
    WCM

  8. #18
    PWCToday.com Is My Home Away From Home justforfun's Avatar
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    Re: boswell

    I ran a set of bosswells for a couple of years and they worked great. I soldered up that jet and put a plug on the one on the outside of the carb then cut that stupid bottom off the carbs. Then they worked just fine.


    Mine were spigot mount so they had the extension with about 100 holes in it,
    Last edited by justforfun; 06-08-2011 at 09:00 PM.

  9. #19
    PWCToday Guru Mentzel's Avatar
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    It is a standard mikuni pilot jet commonly used in sleds. It maybe used as an air jet in the bosswells. I remember they jetted both the air and fuel side if I remember right. You can get those at most dealers. I've got a case of them...

    http://www.carbparts.com/mikuni/mikuni_tuning.htm

  10. #20
    PWCToday.com Is My Home Away From Home JHR's Avatar
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    Re: boswell

    loking for some dual 44 Boswell jetting specs , thanks for your info . jack

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