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Old 09-28-2014, 06:51 PM
Motoman11 is offline
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Help with CRRC pro 45

I have a thor 45cc but it is a crrc engine I got it from a older member of my club I have gas and spark but can only get it to Pop with the choke on after that it will try a time or two then I have to choke it again. What do you think carb? re build it or replace it?
any input is welcome
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Old 09-28-2014, 07:43 PM
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First thing I would do is remove carb and give it a good cleaning....their is a screen in the carb that catches debris.
Second is check the engine timing............get or make a timing wheel their are some good directions for this.......a quick search will find you plenty of info on the subject.


Third ... set the needles to factory settings....most are 1 1/2 to 2 turns out of the low and high needles.


Last, I squirt gas direct into carb and get her good and wet for the first start....a dry carb can be a pain sometime on first start up.


Hope this helps a little
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Old 09-28-2014, 09:19 PM
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thanks I will
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Old 09-29-2014, 05:54 AM
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If the engine has been sitting a long time a carb rebuild kit may also be in order the diaphram is probably hard as a rock impeding the fuel metering valve from letting the fuel flow properly. Easy fix usually.
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Old 09-29-2014, 03:30 PM
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If it has the original CRRC (Jeng Feng etc.) Chinese plug, I would change it out for an NGK for sure.
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Old 10-01-2014, 07:31 PM
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Well I put a kit in the carb fixed some leaks in the manifold I had to lap the surfaces on my surface plat at work not it seems to start better. I still have some work but I am getting closer
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