Tillotson to Mikuni carb conversion? - Snowmobile Forum: Your #1 Snowmobile Forum

72TNTSkidoo · 12-18-2007, 11:48 AM

I called up the guys who did the service work to the engine, and told them how the carb was acting up. There saying I should switch to a "Mikuni", excuse the spelling if I am wrong, but they said those were much more reliable, and that it would be $135 for one. Are they pulling my leg or does this sound like a good idea for the 1972 TNT skidoo?

Mikuni Carburetor Parts

Here are some at the bottom of that page..

**RJ Gleason** · 12-18-2007, 12:37 PM

Very reliable and easier to tune.
You will have to have a fuel pump added and a hole drilled and tapped for the impulse line since the tillotson uses a port through the manifold.

z400kiksazz · 12-18-2007, 12:45 PM

i would buy a used one off ebay, much cheaper.

72TNTSkidoo · 12-18-2007, 07:19 PM

is there a chance i hooked up the return line wrong on the tillotson? I dont know of any manifold, I put the return line over the top off a pin size hole off the carburetor, that sound right?

72TNTSkidoo · 12-18-2007, 08:12 PM

I just tried to start the TNT again. The thing just is bogging left and right and sounds like crap. Now I know its completely carb related and not the engine anymore seeing its just been rebuilt. I was driving on it, and just tuning the carb as i drove it, and no matter what i did, it didn't bite at all, it just bogged down and barely would go 10mph and when doing that it would just sound awful. I have to do something fast, because this winter is setting up to be the biggest in a very long time, and I don't want to waste another storm sitting on this damn thing fiddling with carb needles. Err, I cant explain how frustrated I am to once again be posting something bad about this thing again...

paintballdude05 · 12-18-2007, 09:41 PM

Whats the size of the engine on that TNT BTW?

72TNTSkidoo · 12-18-2007, 10:01 PM

340 model, 343 engine

paintballdude05 · 12-18-2007, 10:02 PM

Oh, I just remebered somebody gave me some cylinders, heads and carb and decided today to go check what they where off of. It turns out its from 70-79 Ski-doo 368 f/c engine. J/w

72TNTSkidoo · 12-18-2007, 10:07 PM