Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions

HI,

I was wondering if anyone here knew what, if any, differences there are between the carb on a Tecumseh HMSK100 and the carb on a Tecumseh HM100 engine.  Just by looking at them the only thing I see different is that the HM100 carb has a primer tube output. I am wondering if a HM100 carb will work on a HMSK100.

Thanks,

Cole

Maybe the JETTING

There's a whole set of threads discussing Tecumseh engines in the 9-10HP range. The gist of it is that the part numbers all seem to be the same, there is no difference that anyone has found. The suspicion is that it is the same engine with different "decals". It is also speculated that the reasons the manufacturers do this is:

1. They can claim the sticker gives the Minimum horsepower;
2. The HP rating is for a different RPM;
3. It saves money since the production line doesn't have to be retooled for different sizes.

There are points where the engines are different. I blew the head on my 11 year old, 10.5HP Tecumseh Snow King engine and replaced it with a brand new 11HP Briggs and Stratton Intek Snow.

1. The Tecumseh was an "L" head while the Briggs was an OHV;
2. The Briggs had a 1" output shaft while the Tecumseh was 3/4" (Turns out 11HP is where the change from 3/4" to 1" occurs)
3. The Briggs seems to have more low end torque but this could be just be due to a new engine, OHV is supposed to have better low RPM torque.

I wouldn't be surprised if the same funniness happens in other HP ranges.