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Boom Size and Cowling for 91/101 JAE

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#1 NeilSharman


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Posted 15 June 2017 - 09:20 PM

I received my 91/101 Truex Short kit from Joe but havent yet ordered the boom tubes.

I measure the holes in the tub and sponson frames are around 10.5mm? What size booms are you guys using? 

Was thinking I should just open the holes and use the 1/2" solid booms? or would 3/8" be sufficient?

Also, where do I get a cowl for this kit?


Thanks in advance.

#2 Amp Eater

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Posted 15 June 2017 - 10:12 PM

 You can do a search this was mentioned:


Per post 30#



The boom tubes are 3/8" solid carbon fiber rod. You can try thick wall tubing but you may want to step up to 1/2" od. 

#3 brad nichols

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Posted 16 June 2017 - 12:20 AM

Depends on power?? I built one for an OPS 90 and used the 5/8" aluminum booms and for a 67 90 I run 1/2" aluminum booms. I made the cowls for these boats e-glass or carbon. The OPS 90 boat had a 5" tub so air ducts were added along the cowl for air.

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Edited by brad nichols, 16 June 2017 - 12:22 AM.

#4 mercguy


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Posted 16 June 2017 - 08:52 AM


I am using 3/8 solid carbon rods for mine. Doc Turner has a nice cowling on his 90 JAE. Mark Bullard made the cowling for him. I believe Mark has a vacuum setup for making the cowling, his number is 256-303-6423.

Bill Hoch

#5 NeilSharman


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Posted 18 June 2017 - 03:56 PM

Thanks for the info guys, this will be enough to get me going. I plan on running a cmb 101.