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Old 05-03-2013, 07:43 PM
D C D C is offline
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Briggs 23hp Vanguard Governor Tewaking?

I have a brand new Briggs Vanguard 23Hp 386777 in my Cub Cadet M54 Tank (got sick of the POS Kaw)

Runs fine, being brand new and all, except the engine speed really isn't where it needs to be for proper mowing.

It idles around 3500-3600.
Under load (blades spinning but not cutting) it's down around 3300-3400.
I would like to see it up around the same 3500-3600 speed where it idles, and where the Kaw used to run.

I checked the governor setting (and found that idles well over 4000rpm are possible if you do it wrong But set properly it's where I said above.

Can the under-load speed be tweaked up a couple hundred rpm or so? Springs, or tab bending??

Thanks,
Dave
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Old 05-03-2013, 07:55 PM
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Dave,

You can bend the spring tab a little but I wouldn't go over 3750 no load......
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Old 05-03-2013, 07:59 PM
D C D C is offline
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Thanks Rob,
Which spring though? I see a vertical spring going up toward the carb, and a short horizontal spring that's grounded to the crankcase.
Dave
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Old 05-03-2013, 08:39 PM
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Hopefully this will help Dave.....


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Old 05-03-2013, 08:40 PM
D C D C is offline
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Ok, found the obvious tab on the short horizontal spring

Also, once again, re-set the governor. Now it's idling around 3700, but turning the blades on drops it to ~3100, and it hunts a little bit, too. Doesn't take much pressure on the governor arm to make this thing absolutely scream.

The slow idle is whacked, too. Hardly drops at all.

Going to try again in the morning.

This thing has less than 10 minutes of run time on it.

Last edited by D C; 05-03-2013 at 08:44 PM.
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Old 05-03-2013, 08:42 PM
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Un-do what ever you did and look above, I posted seconds before you.....
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Old 05-03-2013, 10:00 PM
D C D C is offline
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LOL. That's exactly what I did. Straightened the tab back out & reset the governor to what should be factory intent. That's when I got the 3700/3100 nonsense.
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Old 05-04-2013, 08:11 AM
herler herler is online now
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What is this tewaking you speak of?
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  #9  
Old 05-04-2013, 12:05 PM
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Ok, today's attempt came out a little better

Reset the governor. Idled at ~3100 rpm (same as what it did out of the box, which is why I started tweaking)
Set the low idle to 1200rpm. Had to bend the governed idle spring tab IN quite a bit to get it to idle that low.
Moved the governor spring to a hole further out the governor arm. Brought the rpm to ~3300
Bent the governor spring tab a little to bring the rpm to ~3550.

Under light load (sitting, transport only or PTO engaged without moving) the governor hunts a little.
Under operating load it's fine

So it's pretty good, but not quite there yet
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Old 05-04-2013, 09:54 PM
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Quote:
Originally Posted by D C View Post
Moved the governor spring to a hole further out the governor arm.

You shouldn't have to move the governor spring, That's likely whats causing the hunt. What you did by moving the spring was not only change the rpm but the sensitivity as well which can cause a hunt.

I suggest putting the spring back where it was out the box, Bend the tang for the governor spring as needed to get the high speed no load rpm where you want it. Make sure your throttle cable is adjusted at the hold down properly so you get full travel on the high end.......
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