spark plugs and or a good tune up
have the timing checked on vehicle
ould also check distributer points and distributor cap
what is making my Lincoln ls v8 backfire under the engine
common traps have a cement or stone ballast located under the floor of the trap.
Out of time, or vapor locking if overheated.
Under Heavy Fire was created in 2001.
Under Heavy Manners was created in 1976.
The duration of Under Heavy Fire is 1.88 hours.
I do not know of any snowmobiles that have a button like that. They all have a kill switch that shuts the engine down, and if you push it while under higher rpm's and release it, than there is a chance for backfire.
no it is not heavy anything under 300g is light
Out of time or spark plug wires incorrectly installed.
This is commonly caused by a fuel mixture that is too rich or improper spark n timing
Any number of things: Bad spark plugs, dirty fuel filter, dirty injectors, and on, and on, and on.
get under something heavy