I bought the tauchpanzer 3 tank but it came with it smoke switch missiing any ideas if i can get a new switch

seems as the PSI based switch maybe having issues inside the pump most likely

tie a rope on the handle and allow it to run for 5-min with no load on it if it doesn't clear up then return it to the store you bought it at

Fried rings on the piston...cylinder probably scored also...need to have cylinder re-bored, get an oversized piston (same as re-bore), put new rings on and break it in GENTLY.

Is this a 2 cycle?

Hello, You have too much oil in it.

Your air filter is most likley soaked with oil and need to be replaced. Are you sure it's a single cylinder?

Hope this helps.

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gas cap has no bearing on fuel guage. Sounds like float is broken in tank

white smoke is water, I would drain the tank and start fresh

which is standard or the best motor oil for HDI?

P0446 is an EVAP code.Charcoal canister vent control valve; commonly located under the trunk, at the canister.