farmall h backfire

[pokitisme]

didnt have my farmall h 48 running for about 6-7 months..started it a few days ago and it idled ok.tried to take it for a spin today and got lots of backfires and mostly died on very slight grade..when on flat ground it would move k but still wanted to die.have noticed the accelerator needs to be up a lot more than normal and still does not produce the power it should have...did a quick search on backfires and it says bad gap on spark plugs and unburnt fuel.im thinking i need to wire brush the plugs...i dont know why gap would change from last use and accurately measured gap...unless carbon buildup.

[Jim Becker]

It can't hurt to clean and inspect the spark plugs. A quick pass of a point file (not abrasive paper) through the points can't hurt either. However, my hunch is a sticking valve or two.

[John *.?-!.* cub owner]

Jim pretty much covered it.

[pokitisme]

thanks guys...but what would cause a valve to stick...and is there a "wonder fluid" that would help fix it..like sea foam