Spring tension on throttle
10-31-2008 | 09:08 AM
#1
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From: St. Marys,
OH
Spring tension on throttle
I have a 34cc Briggs & Stratton Fource 4 cylcle motor converted for aircraft. I made a spacer for the carb and cut the spring tension back on the throttle. It will run at idle or with the choke almost closed. I thought it may be sucking air. Checked the gaskets and they are not leaking. I think when I trimmed the spring for less tension that without the tension it leaks in air around the barrel. Any thoughts on changing the carb or fixing this problem.
I don't want that spring tension on the servo all the time so would like to find a more RC friendly carb with less tension and easy movement.
Thanks,
Eric
I don't want that spring tension on the servo all the time so would like to find a more RC friendly carb with less tension and easy movement.
Thanks,
Eric
10-31-2008 | 10:18 AM
#3
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From: St. Marys,
OH
RE: Spring tension on throttle
That makes sense. It has a WYL-451 carb. 9.0 venturi, 12.0 choke bore, 9.0 throttle bore. 31mm on centerbolt pattern.
Any suggestions for a replacement?
Any suggestions for a replacement?
10-31-2008 | 07:37 PM
#4
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From: Melbourne, AUSTRALIA
RE: Spring tension on throttle
ORIGINAL: the mother of invention
I have a 34cc Briggs & Stratton Fource 4 cylcle motor converted for aircraft. I made a spacer for the carb and cut the spring tension back on the throttle. It will run at idle or with the choke almost closed. I thought it may be sucking air. Checked the gaskets and they are not leaking. I think when I trimmed the spring for less tension that without the tension it leaks in air around the barrel. Any thoughts on changing the carb or fixing this problem.
I don't want that spring tension on the servo all the time so would like to find a more RC friendly carb with less tension and easy movement.
Thanks,
Eric
I have a 34cc Briggs & Stratton Fource 4 cylcle motor converted for aircraft. I made a spacer for the carb and cut the spring tension back on the throttle. It will run at idle or with the choke almost closed. I thought it may be sucking air. Checked the gaskets and they are not leaking. I think when I trimmed the spring for less tension that without the tension it leaks in air around the barrel. Any thoughts on changing the carb or fixing this problem.
I don't want that spring tension on the servo all the time so would like to find a more RC friendly carb with less tension and easy movement.
Thanks,
Eric
11-10-2008 | 03:37 AM
#6
Junior Member
RE: Spring tension on throttle
In my converted GX35 I installed WYK-194 sold at www.davesmotors.com
2 needle carburator, diameter 10.5mm.
Works very well, maybe it also fits to B&S engine
Regards
Thomas
2 needle carburator, diameter 10.5mm.
Works very well, maybe it also fits to B&S engine
Regards
Thomas
11-11-2008 | 02:11 AM
#8
Junior Member
RE: Spring tension on throttle
Yes, it is, if you scroll down you find the carb in the middle.
It is the same design as the original from Honda, but full adjustable, no main jet but H-needle
Regards
Thomas
It is the same design as the original from Honda, but full adjustable, no main jet but H-needle
Regards
Thomas
