Posted by Bart Hull on May 22, 2014 at 14:26:45 from (184.101.140.72):
Mowing the lawn with a 5ft brushhog, running 3/4 rpm (no tach) for 3 or so hours. When I tried to reduce RPM with the throttle it wouldn't come down, even pulled kill cable, no dice. When I pulled PTO out of gear it sped up more. Finally had to re-engage PTO, put in 2nd Low and drug the brakes to load the engine and then was able to reduce RPM and then kill the motor.
Strange. I fired it right back up did some more mowing and was able to reduce throttle and kill as normal.
Wasn't running hot, it was in the "Run" zone on the temp gauge but it is a 104 degree day here in sunny Arizona. I've been flushing radiator out as it has lots of crap in it and just changed the oil after the high rpm run today.
This has the early pneumatic CAV Diesel injection pump (Tractor Serial number 1420) 1960.
Any ideas? I'd hate to blow up the motor from over-revving it, cuz I have lots of work for this old gal to do around here.
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