Carb. Problems help!!
06-04-2006 | 06:03 PM
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From: Doon,
IA
Carb. Problems help!!
Hi,
I have a duratrax wrahead and also a nitro evader, and am having problems with the carbs. I can not seem to get them adjusted correctly. The big problem for me on both of them is when I apply the brake the carb is closing and killing the engine. I have tried different adjustments and nothing has seemed to work. I am new to nitro and enjoy it, but this carb issue is driving me away. Any help would be great. Thanks in advance!!!
Mike
I have a duratrax wrahead and also a nitro evader, and am having problems with the carbs. I can not seem to get them adjusted correctly. The big problem for me on both of them is when I apply the brake the carb is closing and killing the engine. I have tried different adjustments and nothing has seemed to work. I am new to nitro and enjoy it, but this carb issue is driving me away. Any help would be great. Thanks in advance!!!
Mike
06-04-2006 | 09:06 PM
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From: Cincinnati,
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RE: Carb. Problems help!!
Few things i dont know what you have tried..but the throttle trim may be set too low thats on the controller...also the brake adjustment, loosen that grub screw and move it...also the idle screw make the carb open farther then when the brake is applied it wouldnt be nearly as closed as it was...Dunno..i dont have brakes on my evader and havent sense 2 weeks i got it lol...
06-05-2006 | 01:12 PM
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From: Butler,
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RE: Carb. Problems help!!
If your engine shuts off when you brake, it is usually either your idle screw is set to low, or else you are too rich on the LSN. Do they die immediately when you apply the brake or do they blubber to a stop?
If they die immediately, it is likely that your idle screw is turned too far out. Turn the idle screw in until it holds the carb open enough to keep it running even when the brake is applied. Ideally, you should have your throttle trim and linkages adjusted so that your carb is always resting on the idle stop screw until you apply throttle. You never want to use the throttle trim to adjust your idle speed. All idle speed adjustments should be made with the idle screw while the brake is applied in the model. This ensures that you are resting on the idle screw when you are making the adjustment. This is easy enough to check. Set your throttle trim at center, leave the throttle at neutral, then apply the brake and see if it pushes the carb slide in any: if it does then that is why you are killing the engine when you apply the brake. Adjust your linkages and throttle trim so that your carb is resting on the idle adjust screw and no longer moves when you go from neutral throttle to braking, then adjust the idle stop screw until your engine is idling at the desires speed.
If they stutter and blubber to a stop then you may just be too rich on the LSN. Try leaning out the LSN 1/8th turn at a time until it stops loading up and stalling when you are at idle.
If they die immediately, it is likely that your idle screw is turned too far out. Turn the idle screw in until it holds the carb open enough to keep it running even when the brake is applied. Ideally, you should have your throttle trim and linkages adjusted so that your carb is always resting on the idle stop screw until you apply throttle. You never want to use the throttle trim to adjust your idle speed. All idle speed adjustments should be made with the idle screw while the brake is applied in the model. This ensures that you are resting on the idle screw when you are making the adjustment. This is easy enough to check. Set your throttle trim at center, leave the throttle at neutral, then apply the brake and see if it pushes the carb slide in any: if it does then that is why you are killing the engine when you apply the brake. Adjust your linkages and throttle trim so that your carb is resting on the idle adjust screw and no longer moves when you go from neutral throttle to braking, then adjust the idle stop screw until your engine is idling at the desires speed.
If they stutter and blubber to a stop then you may just be too rich on the LSN. Try leaning out the LSN 1/8th turn at a time until it stops loading up and stalling when you are at idle.
