CMB 80 New Carb Question
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Hi All,
Just a quick question. I have been playing around with my petrol boats but have decided to get back into Nitro. I have a 42" Seaducer with the CMB 80. It has been running well but I decided to switch to a CMB carb that had a low speed needle to help make it a bit easier to run. I have fitted the new CMB 12mm carb and have started her up and she will idle well now, however when I take the glow plug igniter off, it will slowly die each time. I have checked the plug and swapped this just to make sure it wasn't a faultly one. Is the low speed needle too rich?
Thanks for any info and hope you all have a happy and safe Christmas/New Years.
Cheers
Simon
Just a quick question. I have been playing around with my petrol boats but have decided to get back into Nitro. I have a 42" Seaducer with the CMB 80. It has been running well but I decided to switch to a CMB carb that had a low speed needle to help make it a bit easier to run. I have fitted the new CMB 12mm carb and have started her up and she will idle well now, however when I take the glow plug igniter off, it will slowly die each time. I have checked the plug and swapped this just to make sure it wasn't a faultly one. Is the low speed needle too rich?
Thanks for any info and hope you all have a happy and safe Christmas/New Years.
Cheers
Simon
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Hey Simon,
it sounds like the low speed needle could be a bit rich, also the carby might not be open enough to let it idle the gap should be about 1-1.5mm from fully closed if you know what i mean also the engine might not be warm engouh so it will also stall, hopefully i maybe able to help you in some sort of way lol.
Regards
Bradley
it sounds like the low speed needle could be a bit rich, also the carby might not be open enough to let it idle the gap should be about 1-1.5mm from fully closed if you know what i mean also the engine might not be warm engouh so it will also stall, hopefully i maybe able to help you in some sort of way lol.
Regards
Bradley
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What happens to the engine when you "blip" the throttle out of the water? Does it "bog down" or "pick up" straight away?
Glenn
Glenn
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When I blip the throttle with the igniter in no issues it will clear out the engine and rev fine. without the igniter...it will die straight away. I have tried to warm the engine up a bit before taking the igniter out but didn't seem to help. I thought about the carb not being open enough so did that as well. It seemed to take quite a bit of time to heat the engine as well. Is it possible the Nitro content is just too low for the plug maybe? Normally run 40% but only have 25% at the moment with a Mcoy 9?
Thanks Again.
Thanks Again.