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Re: Rotax Evo - topping out engine then dies
Posted by 'Hootsman' on 08 Jan 2019 @ 13:55


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Hootsman
Joined: January 2008
Total Posts: 35
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I saw a similar issue a few years ago where the pipe from the pump to the carb was too short and it was squashed where it attached to the carb. The
supply couldnt keep up with the demand at max revs.

You can also check whether the pump is in good condition by checking the bubble on the pipe aftervyou have primed the carb. If the bubble stays up the pump is in good condition, if it starts to fall it usually means the pump is leaking across the diaphram and needs changing.

The engine ran fine apart from on the main straight

Karting tools app shows senior 12/79

Evo jetting doesnt appear to be quite so critical as it was on the pre evo. I would suggest something like a 125 and go from there.

Message Thread:

Rotax Evo - topping out engine then dies  by 'GR2'   (07 Jan 2019 @ 11:37)
Re: Rotax Evo - topping out engine then dies  by 'Started out fun'   (07 Jan 2019 @ 20:24)
Re: Rotax Evo - topping out engine then dies  by 'Jeff Johnson'   (07 Jan 2019 @ 22:24)
Re: Rotax Evo - topping out engine then dies  by 'Gray33'   (08 Jan 2019 @ 5:54)
Re: Rotax Evo - topping out engine then dies  by 'GR2'   (08 Jan 2019 @ 9:30)
Re: Rotax Evo - topping out engine then dies  by 'Hootsman'  << You are here!
Re: Rotax Evo - topping out engine then dies  by 'alanrr'   (10 Jan 2019 @ 1:04)
Re: Rotax Evo - topping out engine then dies  by 'GR2'   (11 Jan 2019 @ 13:05)

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