So, what is this thing, and what does it do?

Lanse · Oct 29, 2018

Hey everyone! I'm working on my Ford 820 and I'm a little stumpted by this, contraption. Can anyone explain what it is, and what it does? The engine surges when its running, so I think theres a spring/governor problem somewhere. Thanks in advance!

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grandpa Love · Oct 29, 2018

The funny washer thing? It should have a friction disk under it and holds the throttle where you set it.

RobCons · Oct 29, 2018

Tension is adjusted by turning the nut. It holds the throttle in position against the governor.

John M · Oct 29, 2018

You have the plug wires in the wrong order on the AC. I know you don't read comments, and people have been telling you that you need to fix it.

IanC · Oct 29, 2018

Many times surging is a fuel problem, not a governor problem. Fuel flow drops causing RPM to drop causing governor to open, then fuel flow returns causing RPM to go up, rinse and repeat.

MarkB_MI · Oct 29, 2018

FWIW, your friction disk is missing its cotter key. Otherwise, if the throttle stays put everything is fine, if it doesn't stay put you need to clean or replace the friction washer.

Surging most likely means you have a plugged idle circuit.

Andy C · Oct 29, 2018

That is a tension spring for the throttle. I maintaines the throttle lever in position. This would not likely cause surging, just either too hard to move throttle or lever would not stay in position you put it. I would first look at carburetor. Mainly the load/high speed circuit. If you reach in and physically hold the throttle in one position does it start to falter? if it does look into rebuild of carb and check fuel flow from tank. If it does not run out of power when holding it in position look into setting governer. Please take the time to do a followup as to what you find.....

Dieseltech · Oct 29, 2018

Surging on any gas engine CAN be a governor problem IF the governor arm to carb throttle shaft is the wrong length. May not be a carb problem at all. On your application if the rod is too short, it will surge. If too long, governor will be lazy and not respond when under load. With engine off, throttle wide open, the book calls for the ball end to just fit on the throttle ball. Just went through this on my Ford 4000 gas with the 172 engine.

KCTractors · Oct 29, 2018

Clean the spring and governor linkage in front that connects to the governor arm.

So, what is this thing, and what does it do?

Lanse

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grandpa Love

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RobCons

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John M

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IanC

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MarkB_MI

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Andy C

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Dieseltech

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KCTractors

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