Honda HS 521 Governor Arm Leaking? - Snowblower Forum : Snow Blower Forums
 
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post #1 of 7 Old 02-09-2016, 11:10 PM Thread Starter
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Honda HS 521 Governor Arm Leaking?

I finally got this single stage running. Clogged fuel float passage in carb!!
However the governor arm (seal?) is leaking OIL! Looks complicated?
Any hints on how to deal with this?
Can I still use it while keeping an eye on the oil level? OR is there any concern of doing serious damage?
I will post pictures soon.

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post #2 of 7 Old 02-09-2016, 11:48 PM
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Are you talking about the round governor shaft that comes out of the engine and attaches to the governor arm that is linked to the carb throttle plate?

If so, is your shaft mounted vertically or horizontally? If its spurting oil like a cut artery, then don't use it. If its just oozing a bit, use it but keep an eye on the oil level.

If it is a vertical shaft, I am a bit surprised that it would be leaking. Have you checked and make sure you don't have too much oil in the crank case, like overfull.

Also based on what you said about the carb problem, see if the oil smells like gas. If the carb float is not adjusted right, and it's not sealing the needle valve when the bowl is full, gas can seep into the carb intake and leak into the engine crankcase through the intake valve.

So you end up with gas in the oil, severely reduced lubrication in the engine, and possible oil squirting out of breathers, seals, holes for governor shafts and any other place it can find to escape.

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post #3 of 7 Old 02-09-2016, 11:50 PM Thread Starter
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Quote:
Originally Posted by Biketrax View Post
I finally got this single stage running. Clogged fuel float passage in carb!!
However the governor arm (seal?) is leaking OIL! Looks complicated?
Any hints on how to deal with this?
Can I still use it while keeping an eye on the oil level? OR is there any concern of doing serious damage?
I will post pictures soon.
Some pictures
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post #4 of 7 Old 02-09-2016, 11:59 PM
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Originally Posted by Biketrax View Post
Some pictures
I looked at the GX140 engine diagram, and it does not show any seal for the governor shaft where it comes through the engine case, just a washer and a clip to hold it in.

Is that oil or water, or oil and gas sitting there? Maybe mop it up clean, and then run the engine and see if you can see it coming out around the shaft.

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27", B&S 305cc 13.5 ft/lb Torque 9.5 hp
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post #5 of 7 Old 02-10-2016, 11:25 AM Thread Starter
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Quote:
Originally Posted by skutflut View Post
Are you talking about the round governor shaft that comes out of the engine and attaches to the governor arm that is linked to the carb throttle plate?
yes
Quote:
Originally Posted by skutflut View Post
If so, is your shaft mounted vertically or horizontally? If its spurting oil like a cut artery, then don't use it. If its just oozing a bit, use it but keep an eye on the oil level.
vertically
Quote:
Originally Posted by skutflut View Post
If it is a vertical shaft, I am a bit surprised that it would be leaking. Have you checked and make sure you don't have too much oil in the crank case, like overfull.
norm level
Quote:
Originally Posted by skutflut View Post
Also based on what you said about the carb problem, see if the oil smells like gas. If the carb float is not adjusted right, and it's not sealing the needle valve when the bowl is full, gas can seep into the carb intake and leak into the engine crankcase through the intake valve.

So you end up with gas in the oil, severely reduced lubrication in the engine, and possible oil squirting out of breathers, seals, holes for governor shafts and any other place it can find to escape.
Will investigate that!

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post #6 of 7 Old 02-10-2016, 11:31 AM
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There is a guy on youtube that has a video on how to fix that on a mower. Should be the same principle. His user name is doublewide6. Check it out. Good luck.
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post #7 of 7 Old 02-10-2016, 11:31 AM
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I'm not terribly familiar with that model of engine, but it seems likely to me that this is happening because of excessive pressure in the crankcase.

There are two likely causes of that: a venting problem, or excessive blowby. I'd check out the venting system and if you don't find anything, it could be worn piston rings or something like that.

Does the engine smoke at all (blue smoke) or is there an odor of burning oil when it's running? That would be another pointer to worn rings.

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