Michigan PI
Senior Heliman
Location: St Clair Shores, MI
| First of all, check/tighten the head and backplate bolts. I do this on all new engines and have found many of them to be loose.
I can't speak from experience on the TT70 however I can for the 50.
If you are using a 46 size muffler, lose it. There's just not enough volume in it. The 2pc Hatori 60 muffler works very well and bolts up without modification. Start off with both needles at about 4 turns. Remember to have the throttle barell closed to it's MECHANICAL limit when checking the idle mixture screw for a proper reference. I run Enya #3 plugs also.
I found this engine LOVES to be run rich and from what I have heard, so does the TT70.
I am running 15% nitro and 22% oil and the TT50 running rich on a muffler blows away the former engine, an OS46fx running 30% on a tuned pipe.
The 50 is very torquey and likes to be loaded. It is pulling 11 deg on the Raptor at 1850 rpm and is still not broke in yet, only about 1/2 gal of fuel through it.
What exhaust and needle settings are you running on yours? |
