Hi All,
I hope this is the right area to post looking for help.
I've got an old Yamaha Big Bear that I'm trying to get running as a bit of a project between jobs, but I've run into a problem that my novice mechanical skills cannot get around.
Compression test on the engine looks good.
I am getting spark from the lead when I press the start button. (and the fire suggests there's spark from the plug)
Various bits and pieces are spinning (behind recoil starter for example).
So things are not looking bad, but while I don't have the new carby in yet, I wanted to test with a little spray of Engine Start (like I've seen on all the Youtubes :p) and instead of sucking the spray in the intake manifold and burbling to life, it seems to backfire (explosively) and catch on fire.
I know you can do damage if you go crazy with the Engine start, but this happens with even a tiny spray.
What should I look for that might be the cause of this, anyone?
Thanks so much
