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payne1967

Elite Veteran

uk

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my tas 24 engines carb is playing up on my bell47 gasser
cleaning it and fitting a service kit into it hasn't been too successful
the walbro carb has wt 803 with 486 underneath it
it has no primer bulb and the choke is part of the air cleaner
anyone know of what carbs that I can use to replace it?

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07-23-2016 11:40 PM
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BeltFedBrowning

Key Veteran

USA

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You sure that its not a WT-603 instead of an 803?

perfer et obdura; dolor hic tibi proderit olim

07-24-2016 04:26 AM
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payne1967

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uk

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it looks like an 8

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07-24-2016 07:13 PM
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rbort

rrProfessor

Franklin, MA - USA

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Use a 990

Or a 643.

-=>Raja.

MA 1005 Hanson 280, 4038 flights
Raptor 90 Hanson 300, 267 flights
Spectra-G G270 3DMax, 3112 flights
Whiplash-G G270 3DMax, 1272 flights

07-24-2016 07:15 PM
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payne1967

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uk

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Thanks Raja

I've found a new 257 local to me
what's your thoughts on this carb?

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07-24-2016 09:40 PM
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geomecc

Key Veteran

Long Island ,NY

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does that one have a primer bulb?

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07-25-2016 02:53 PM
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payne1967

Elite Veteran

uk

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the 257 doesn't have the priming bulb like the original carb
once fitted a primer bulb isn't accessible but there is enough room for the primer to be on the carb

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07-25-2016 10:19 PM
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rbort

rrProfessor

Franklin, MA - USA

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The 257, not very good

I tried it in a helicopter I didn't like it. Works better in an airplane motor. I'd stay away from that one, and in helis you really can benefit from having a primer bulb.

If you can't find something, I have a used carb I could probably sell you, probably after I get back from IRCHA.

-=>Raja.

MA 1005 Hanson 280, 4038 flights
Raptor 90 Hanson 300, 267 flights
Spectra-G G270 3DMax, 3112 flights
Whiplash-G G270 3DMax, 1272 flights

07-26-2016 12:59 AM
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payne1967

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uk

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I've found a 990 and its making its way to me
thanks for your wisdom Raja

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07-26-2016 10:26 PM
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rbort

rrProfessor

Franklin, MA - USA

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You're welcome!

Start with needle settings of 1 1/8 L and 1 1/4 H and adjust from there as necessary.

-=>Raja.

MA 1005 Hanson 280, 4038 flights
Raptor 90 Hanson 300, 267 flights
Spectra-G G270 3DMax, 3112 flights
Whiplash-G G270 3DMax, 1272 flights

07-27-2016 03:34 AM
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payne1967

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uk

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thank you

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07-28-2016 12:15 AM
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payne1967

Elite Veteran

uk

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its been a while
the wt990 is fitted and the engine has never run so well
in fact it runs that well i'm going to fit one onto my other hirobo bell 47 that has never given any trouble carb wise

thank you again Raja for your excellent advice

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09-11-2016 10:43 PM
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rbort

rrProfessor

Franklin, MA - USA

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Happy to hear it!

You're very welcome and enjoy!

-=>Raja.

MA 1005 Hanson 280, 4038 flights
Raptor 90 Hanson 300, 267 flights
Spectra-G G270 3DMax, 3112 flights
Whiplash-G G270 3DMax, 1272 flights

09-12-2016 12:32 AM
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