k&b carb question
03-03-2006, 07:39 PM
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k&b carb question
i have a k&b .40 engine i bought a few years ago for a project. i have yet to finish that project because of putting it away for some time.... i had the engine out looking at it because in the past few months ive learned a lot more about nitro from this site. i bought a nitro car and have tuned it and such so im learning. i was looking at the k&b engine (its marine) and i was wandering which adjustment were which on this carb. i added some pictures.. i am wondering if the high rpm needle is the one on the end. i know the low end needle in the one with the throttle adjustment lever. and i believe the idle in the one on top.. am i right? sry about the pictures.. i took them from my phone
03-03-2006, 08:37 PM
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RE: k&b carb question
Yes, the low speed needle is the one on the throttle arm side. The high speed needle goes on the other side, where the lock nut is. The one on the top is the low speed end point adjustment and removing it allows you to remove the throttle barrel.
03-03-2006, 09:17 PM
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RE: k&b carb question
That's what I'm guessing as I don't see one sticking out.
If you want a better/newer carb, I'd suggest the K&B Red carb as it's made for .45's yet should be no problem for your .40 . The newer .45 carbs I don't like as they have a tiny screw that holds the low-speed disc in place and falls out easily. Yes, it has a disc instead of the normal low-speed screw.
If you want a better/newer carb, I'd suggest the K&B Red carb as it's made for .45's yet should be no problem for your .40 . The newer .45 carbs I don't like as they have a tiny screw that holds the low-speed disc in place and falls out easily. Yes, it has a disc instead of the normal low-speed screw.
03-03-2006, 10:59 PM
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RE: k&b carb question
ORIGINAL: fishy2k8
so what is this for?
so what is this for?
03-03-2006, 11:16 PM
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RE: k&b carb question
Check the Mecoa site, they may have a needle it. Here's a link to the K&B parts page: http://www.mecoa.com/kb/parts.htm
03-03-2006, 11:58 PM
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RE: k&b carb question
Great, now you can tell exactly what parts are supposed to be there. Remove the needle lock nut, slip a piece of fuel tubing over the needle collet and try blowing through it. If it's open, the person forgot to send the needle. If it's plugged than he was probably using a remote needle.
03-12-2006, 01:34 AM
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RE: k&b carb question
well i have solved my problems.. the engine box has foam in it and under the foam i knew there was a small bag with the bolts for the exhaust.. and there was another thing with it, at the time i thought was a hex wrench.. well now that i know something about nitro engines.. i was looking through there today and saw that and was like duh.. thats the needle.. the guy had to take it out to put it in the box! thanks for your guy's help.
