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Old 10-12-2014, 01:01 AM
CutsForCancer CutsForCancer is offline
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Briggs Intek 10.5hp question

I have a briggs and stratton intek 10.5 hp on a red hawk 32". it was running excellent without issue. I cut ten lawns and the next day had one more to do. the mower started right up and idled smoothly throughout the rpm range. it would bog when blades were on and would not cut due to low rpm. I thought it was having a govenor issue so i adjusted the govenor arm using a you tube clip. still nothing. i tried to adjust the valves and noticed the bottom exhaust valve barely moves when the motor is cycled by pulling the cord. is this motor toast?
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Old 10-12-2014, 01:28 AM
herler herler is online now
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No, you have some other kind of a problem, likely a minor issue.
You folks need to stop assuming the worst, always start with the easy stuff.
On that note I would stop fooling with the governor and hope you didn't mess it up, thou with your experience you probably didn't...
Now, why would it bog?

Oh...

You don't per chance have the choke ON, do you?
It's possible that while you were running it, a branch caught the lever and choked it.
That would be my first check, the solution is most likely something simple, hopefully someone else will chime in.
Another check would be to make sure the fuel line isn't kinked, like a stick got in there...
On that note I'd be checking the throttle linkage as well, make sure it's all clear and free of debris.

And then...
The spark plug wire, right along the same lines it's possible a branch caught it and partly unseated it.
The wire is still on the plug but has been worked loose, just needs to be re-seated.

Those are the kind of things I would be looking for.

Last edited by herler; 10-12-2014 at 01:32 AM.
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Old 10-12-2014, 08:43 AM
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Restrorob Restrorob is offline
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Quote:
Originally Posted by CutsForCancer View Post
the bottom exhaust valve barely moves when the motor is cycled by pulling the cord.
If you think the bottom valve is the exhaust one of two things happened;

1) You watched the wrong Utube vid.

2) The yayhoo in the vid didn't know WTF he was do'n.

The bottom valve is the intake, Is both valves completely closed (both rockers even) at TDC compression stroke ?

If it's barely moving loosen the rocker then remove the push-rod and see if it's bent.

Proper adjustment;

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Old 10-12-2014, 10:23 AM
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ilike2mow ilike2mow is offline
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Fuel filter plugged or air filter plugged?
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Old 10-12-2014, 12:57 PM
CutsForCancer CutsForCancer is offline
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Quote:
Originally Posted by herler View Post
No, you have some other kind of a problem, likely a minor issue.
You folks need to stop assuming the worst, always start with the easy stuff.
On that note I would stop fooling with the governor and hope you didn't mess it up, thou with your experience you probably didn't...
Now, why would it bog?

Oh...

You don't per chance have the choke ON, do you?
It's possible that while you were running it, a branch caught the lever and choked it.
That would be my first check, the solution is most likely something simple, hopefully someone else will chime in.
Another check would be to make sure the fuel line isn't kinked, like a stick got in there...
On that note I'd be checking the throttle linkage as well, make sure it's all clear and free of debris.

And then...
The spark plug wire, right along the same lines it's possible a branch caught it and partly unseated it.
The wire is still on the plug but has been worked loose, just needs to be re-seated.

Those are the kind of things I would be looking for.
The mower is newer to me only two months so I don't know service history. When I purchased it fresh tune up was completed by previous owner. Mower ran great all thru rpm range very smooth. Engine would dip when blades engaged but governor would ramp the rpm right up. Now it stumbles on blade engagement and doesn't recover. When I went to adjust valves you can see the bottom exhaust valve isn't compressing the valve spring but a quarter inch or so.
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Old 10-12-2014, 04:37 PM
dboyd351 dboyd351 is offline
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Could be carboned up muffler/exhaust port or air leak in the intake, as well as the air filter, fuel line/fuel filter restriction possibility.
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