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Hey thanks for the helpful suggestions, Rivets and Sgkent. I spent the past couple of days working on this and think I finally resolved the carb, electrical, and governor adjustment issues. As usual, I became impatient with trying to clean the tiny orifices of the original carb carb and...

In years past, our Toro GTS mower (see attached) would start reliably, but starting this year has been a non-starter. I tried cleaning the carb, then replacing the carb, and it still will not start relaibly. Thinking that it may be the governor linkage, I tried adjusting the governor arm...

I adjusted the governor linkage according to the procedure previously posted from the Tecumseh service manual (thanks Rivets), and tried mowing first with the repaired original carb, then with the replacement eBay carb. The mower still has a tendancy to stall in high grass and is difficult to...

Following up on my tune-up progress with the stalling and hot restart problems with my robo mower gas engine, I've been addressing a variety of deferred maintenance issues that came along with purchase of the old mower used a a basis for the robot. Besides the carb diagnosis, idle jet cleaning...

I read through the Tecumseh references from Rivets and while much of the material is beyond my mechanical experience, I suspect that the interior cavity of the idle screw I removed may be more involved that I first thought. While the thin copper wire I could not push through the end orifice to...

Thanks for your comments, skiman. All of the stalls have been in thick grass on relatively flat terrain when the mower has bitten off more than it can chew. So I don't think that slope or up/down attitude is the issue. Also, I've found that the mower's light weight (135#), wimpy wheelchair...

I removed the plastic cap and idle jet. It looks pretty clean to me, but when I insert a very thin copper wire into the hole in the end, it will not fully insert. Should I be able to see the inserted wire through the side holes?

Good comment, sgkent. I also should sharpen the blade on the r/c mower. My larger 12 hp riding mower with 38" deck does not have similar stalling problems in tall grass, but it is too dangerous to use on the double fall line steeps.

Thanks for sending the service manual link, Rivets. I haven't fully researched my issue yet, but there is lots of info about carb and governor adjustment that gives me a much better picture of how things work. I'll take a look at the idle jet after a morning coffee primer.

I recently completed a robotic lawnmower project using an old Craftsman push behind mulching mower (917.388621) with a 6.75hp engine (143.016702). Actually, the mower is not entirely robotic at this point, but computer control is in the plan for the next stage in its evolution. Right now, it...