D4 7u Pilot motor fuel tanks

Clean it good once and coat it inside. Several products available to do it with. I use one called RED KOTE. I think there is a POR 15 product and there are others.

I use Redcote in one of mine and then have used chain saw mixed premium gas since. Knock on wood but so far so good. I put about 30 ea 3/8 nuts in it first and shook it for a few days every chance I got. I've heard of them being bolted to a spoke om a tractor wheel and being rattle cleaned while doing fieldwork. Put a threaded plug in the bottom before you pour the redcote in so you dont fill the threads.

I strapped my D2 tank to my lawn mower and added nuts,bolts,sand and water and it came out really clean-then redcoat it

Muriatic acid works very good to clean out the tank.. Then clean with baking soda solution to neutralize the acid. Then recoat and let dry for several weeks before adding fuel. Letting the coating cure completely is very important.

like said use bolts and shake, then if you dont use the cat much i run chain saw gas in them and keeps the carb. and tank from rusting much

I've thought about making a tank out of Stainless Steel. Are the D4 tanks the same as the D2 tanks? I have a D2 3J that has a Nasty tank...