TBR7 smoking

[mrstrick]

My TBR7 has started smoking when hot. It started smoking smoking a few days ago all at once. It also has a lot of crankcase blowby. The piston, rings and bore look perfect. Possibly a valve seal? I've worked on engines my whole life and this has me stumped.

[perljamz10]

Hmmmm. Wrong oil? Too much oil? Really dusty environment just getting sucked into the engine on a regular basis? Valve clearance adjusted? Do you have a nasty habit of doing burnouts 5x a day for 30mins at a clip? lol. Dirty fuel leaving deposits? Getting enough airflow to the engine? Sounds like you might as well tear the whole thing down and build it back up again nice and clean.

[buzz]

Hi just wondering how many miles? , and what year it is?.Are you running stock air filter,the right one. Some people are useing briggs filter and they don't fit right.

[CheapThrills]

Smoking from where again?

[severely]

Originally Posted by mrstrick

My TBR7 has started smoking when hot. It started smoking smoking a few days ago all at once. It also has a lot of crankcase blowby. The piston, rings and bore look perfect. Possibly a valve seal? I've worked on engines my whole life and this has me stumped.

May I suggest a compression test is needed. Make sure the valves are properly adjusted beforehand. Check compression with the carb fully open and note results, anything below 90/100 psi is marginal for running. Now pull the tester and pour a teaspoon of oil in the sparkplug hole, reconnect tester and repeat test. If compression jumps up after this it's a giveaway your piston/rings are worn out. Good luck, happy hunting,

[CheapThrills]

Went out for a long ride, even pushed my TBR7 on the highway for a while. I now have copious amounts of oil coming out of the crankcase vent.



Good source for engine rebuild parts? Will confirm with a compression test soon.

[buzz]

She needs a rebuild,they don't last forever.