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Old 04-25-2004, 04:04 PM   #1
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Default Spitting fuel out of carb

Last edited by ottoman; 04-29-2004 at 09:22 AM.
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Old 04-25-2004, 05:45 PM   #2
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Default Re: Spitting fuel out of carb

Originally posted by ottoman
I am having a problem with my nitro car that I can’t seem to solve. I experience it all last summer and now again while I was breaking in my new motor for this season. Here’s what happens…
When I start the motor cold… first time of the day or before every heat… the motor starts fine but it idles much slower than I have it set for. If I give it any throttle it dies. If I let it idle for 30 seconds it (usually) suddenly jumps back up to the correct idle speed and will accept throttle. Last season I thought it was a clutch problem… dragging some until it ran a few seconds but I never could find anything wrong with the clutch.
Today I was finishing breaking in my new motor. I had the engine set back away from the spur gears so they were not engaged while I ran in the first few tanks. Everything was going well until I let it cool and filled the tank and restarted it… it idled slower than before I shut it down and it wouldn’t take any throttle without dying… then suddenly it picked up idle speed and would take throttle. I tried this with every tank and it’s the same… I did notice that when its running slow it spits fuel out of the carb and if I crack the throttle a few thousands of an inch it blows out more fuel and continues until it just dies . Once the idle speed returns to normal no fuel spits out and everything runs great.
I have played with carb settings. I replaced the lines and fuel tank I just went through the carb… checked orings etc but I can’t find anything wrong. The first engine was a Nova Mega .12 and this one is a MR12.
Any ideas?
Tooo rich on the bottom end , way too rich. Lean it on the bottom and then work on top end.
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