Engine makes a poping noise

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, and others.
R

rcnutctb

Reading the Rules!
Messages
275
Reaction score
0
Location
St.Charles,Mo
Hi guys have a little problem engine pops when I give it the gas leaned the low & high needles an 1/8 thinking it was to rich only have about a tank ran through it any ideas? Thanks
 
Turns out spark plug got loose. Speaking of plugs what is the replacement for this its suppose to be a 30 engine I checked but its an of brand (china I guess) the no. on it is INT H-CMR5 any ideas. thanks again for all your help
 
I run a NGK CMR7h in my MT's 26cc engine. I've never had a problem so far with that plug. In the manual for my engine it has the 25cc,26 and 30. I'd assume the NGK would work with the 30cc it sight unseen. The 30cc looks to be mechanically the same engine just with a bigger piston.
 
I run the cmr7h in my 29cc zenoah. I picked up a spare from the local parts store for $3.29 (I think it was that much) I know the gas octane can cause ping if it's too low, I only run premium, for 2 reasons: 1- the octane rating, 2- it's the only way to be ethanol free in MO. The ethanol has dissolved the fuel lines in the leafblower and the weedeater at work so I'm not running it.
 
it was a popping almost a back fire noise coming from the exhaust ,after this gallons gone I switch to 93 octane, do you guys ever use Stay Bill fuel saver?
 
Another thing I though about buying premium gas, if you only buy 1 gallon at a time you should buy 2. Put the first in your daily driver and the second in your mix tank. Otherwise you just paid premium price for the cheap gas left in the hose from the guy before you.
 
teedog12 said:
Hi guys have a little problem engine pops when I give it the gas leaned the low & high needles an 1/8 thinking it was to rich only have about a tank ran through it any ideas? Thanks
Click to expand...
When does your engine pop? When you are reaching full RPM's??
 
I'd take it apart and clean it thoroughly. You'll need new gaskets, obviously. Or you could just buy a new carb. If you're running a Walbro knockoff, you'll want to upgrade anyway.
 
This is a tt I bought this summer new,has a 30 in it don't know how to tell what kind of carb it is only ha s a couple runs on it
 
Back
Top