I finally got to look at the tractor again. At high idle the tach showed 2120 rpm. tried to adjust
the high idle stop on pump but could not get it to any higher than 2120 rpm. Pulled dash and
checked wiring from dash to alternator. Wiring ohms was good on both small terminals. Set
my fluke meter to hertz and read the meter as I slowly raised the rpm seemed to to increase
the hertz smoothly. At 302 hertz the tach read 1020 rpm and at 609 hertz it read 2120 which
was the max reading I could get after trying to adjust the high idle. I do not have an optical tach
to check engine rpms but guess I could see about getting one. It appears that the dash unit my be faulty
but am still not sure about the alternator. Any thoughts on what I may have missed?
Your help is always appreciated.