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#4749931 - 05/07/18 07:56 AM Honda gx390 governor falling back to 3200rpm?
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4894
Loc: Houston, Texas
What causes the throttle control arm to not stay at 3600 rpm? I can manually move it all the way over and it will go to 4000 then let go and it will go to 3600 then slowly work it's way to 3200rpm no load, 2800rpm under load. This is a pressure washer with 9hrs on it.
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2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4749951 - 05/07/18 08:32 AM Re: Honda gx390 governor falling back to 3200rpm? [Re: motor_oil_madman]
Rand Offline


Registered: 08/20/03
Posts: 12726
Loc: NE,Ohio
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2019 Jeep Cherokee Trailhawk 2.0T

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#4750051 - 05/07/18 11:11 AM Re: Honda gx390 governor falling back to 3200rpm? [Re: motor_oil_madman]
Tman220 Offline


Registered: 09/20/16
Posts: 153
Loc: MN
There is probably a nut you can tighten down that will increase the rotating friction of the throttle arm.
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#4750177 - 05/07/18 01:22 PM Re: Honda gx390 governor falling back to 3200rpm? [Re: Tman220]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4894
Loc: Houston, Texas
Originally Posted By: Tman220
There is probably a nut you can tighten down that will increase the rotating friction of the throttle arm.


There is, but I'm not sure if that will affect how the governor operates. I guess the throttle lever is different than the governor arm. What causes it to change? It worked okay in the beginning afaik.
_________________________
2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4750846 - 05/08/18 07:30 AM Re: Honda gx390 governor falling back to 3200rpm? [Re: motor_oil_madman]
mk378 Offline


Registered: 09/27/15
Posts: 1448
Loc: USA
The speed control lever is supposed to stay where you set it because of friction from the pivot nut. If it does not stay, tighten the nut. If it is too hard to move, loosen the nut. That will not affect anything else.


Edited by mk378 (05/08/18 07:33 AM)

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#4751644 - 05/08/18 10:30 PM Re: Honda gx390 governor falling back to 3200rpm? [Re: motor_oil_madman]
punisher Offline


Registered: 09/11/04
Posts: 2425
Loc: snowblind in TX
The spring controls your governed speed. Off chance the wrong spring was installed, or maybe the engine is supposed to run at 2800 RPM loaded.

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#4752651 - 05/10/18 07:23 AM Re: Honda gx390 governor falling back to 3200rpm? [Re: punisher]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4894
Loc: Houston, Texas
[quote=punisher]The spring controls your governed speed. Off chance the wrong spring was installed, or maybe the engine is supposed to run at 2800 RPM loaded. [/quote

It ran at the correct rpm for a few hours atleast. I'll go ahead and tighten that nut and then maybe turn the stop screw in a little bit so it runs at 3600rpm and not 4000 when all the way against it.
_________________________
2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4753567 - 05/10/18 10:04 PM Re: Honda gx390 governor falling back to 3200rpm? [Re: motor_oil_madman]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4894
Loc: Houston, Texas
I tightened the nut. It stays in place now, haven't started it up yet though.
_________________________
2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4754812 - 05/12/18 07:50 AM Re: Honda gx390 governor falling back to 3200rpm? [Re: motor_oil_madman]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4894
Loc: Houston, Texas
Worked like a charm.
_________________________
2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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