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580 case C adjusting idle

B

Bill95709

Member
Joined
May 16, 2024
Messages
18
Location
Paradise ca.
I’ve replace the injection pump with a rebuilt one. It wasn’t cheap but it runs good now. I’d like to turn down the
Idle which should be easy but I thought I read something maybe in the manual not to do it on the linkage. Is there some special way to adjust the throttle? Can I just adjust the throttle linkage? I don’t want to screw something up.any advice would be wonderful.
 
F

franklin2

Senior Member
Joined
Aug 6, 2016
Messages
314
Location
Virginia
Here's the info from the manual. Looks like the governor is involved in some of this so be careful.
 

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thepumpguysc

Senior Member
Joined
Mar 18, 2010
Messages
7,680
Location
Sunny South Carolina
Occupation
Master Inj.Pump rebuilder
There’s a screw on the inj pump.. simply loosen the 5/16 nut and use either a screwdriver or a 5/16 nut drive and back it out a tad, until you’re happy..
 
B

Bill95709

Member
Joined
May 16, 2024
Messages
18
Location
Paradise ca.
The hand throttle is all the way down. From what the manual says is to use a tachometer. Don’t have one and wouldn’t know where to put it anyway. And if do turn it down should I put lock tight on the stop nut? I’d think my ears would tell me when it’s slow enough.
Ty bill
 
T

thepumpguysc

Senior Member
Joined
Mar 18, 2010
Messages
7,680
Location
Sunny South Carolina
Occupation
Master Inj.Pump rebuilder
Loctite is by not necessary..
A Photo-tach is a handy tool..
Only costs 20.00 online..
It comes with reflective tape and u stick it on the harmonic balancer.. then pull the trigger on the tach and bob’s your uncle..
If u wanted one for the dash, most of them read off the alternator..??
 
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