Question about Briggs & Stratton Briggs Stratton Intek V - Twin Vertical Ohv Engine with Electric Start 22 Hp, 1" X 3 5/32" Shaft, ModelNo. 44K777 - 0027 - E1

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Engine idles at high speed after carb overhaul. I overhauled the carburetor and reinstalled on the engine. I left the choke and throttle links attached on the carb for orientation and assembly. When I reinstalled, the engine started up and gradually increased speed to maximum without any throttle. I did not adjust the governor, springs or controls. I removed the carb and checked the solenoid, throttle and choke movement, loose fasteners, and solenoid. All is fine, What should I look for before adjusting the governor. Engine: 407777, Carb: 499804

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Posted on Jan 02, 2017

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SOURCE: carburetor adjustment

have you checked the air filter,if that is clean I think I would replace the carb, diaphram.

Posted on Jun 21, 2009

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SOURCE: 22 hp Briggs Intek will not run at full speed without choke on

sounds like you sucked up dirt in the carb needs to be taken off and cleaned

Posted on Jul 20, 2009

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1 Answer

Very high idle after rebuilt carburetor on Chevy 250 l6. Choke is okay, no fuel leaks. Engine races at about 3000 rpm

Sounds to me like the throttle plate is too far open at idle. Look for something hanging up and holding the throttle more open that it should be-like the choke like the auto choke or the fast idle cam screw set to far in. Look up the fast idle speed adjust procedure in the books and check out how yours is set up. Also, if the carb was all the way apart the throttle plate may be off center on the throttle plate shaft causing extra air to bypass the throttle plate. Good luck.

Jan 03, 2015 | Cars & Trucks

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03 1200 only starts with choke all the way out and stays out to keep it idling, can not give it any throttle or it dies, push choke in any at all it dies Only has 1557.0 mils on it, fresh gas in it, vac...

Hey LD,

Bummer. Sounds like one of a couple of things... You did not specify what BRAND your bike is, but with the slide comment, I presume a Mikuni or similar type of carb.

So the artificial enrichment circuit is actuated during choke operation. This circuit only works with the throttle plates in the IDLE position. ANY throttle and that circuit drops out of the picture and the idle/slow/main jet circuits take control.

You COULD have a huge vacuum leak, and that would cause what you describe. Look carefully, squirt bottle some water around the intake/carb/manifold areas. Any change in idle is suspect. But you may not be able to achieve this, based on choke only operation.

SO, my thought is something is plugged in your carb. This happens with old gas and stagnation. Often the enrichment circuit will flow, but not the idle circuit. The only remedy is surgery. Typically you pull the carb(s) so you can inspect well on a bench. Pull the float bowl and look for foreign material of any kind. I have seen moss like growths in there... Perform an overhaul, with the long submersion, followed by flushing and high pressure air..

There is one other, fairly Bonsai method that works: You fire up the bike, with the air cleaner off.... Get as much engine speed as you can... One hand on the throttle, ready to open, and briefly cover the entire carb intake with the palm of your hand, at the same time, you need lots of throttle. What this does is sometimes dislodges a blockage. Really works well on lawnmowers. This takes a time or two for you to get everything synced, but you need lots of throttle and full intake air restriction. Sometimes works, sometimes not. I always worried about being successful as that means there is some chunk of something floating around somewhere in my carb. I would perform surgery.

I hope this helps.


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1 Answer

High idle speed

Hi, Anonymous and the usual suspects are:
1. Throttle cables improperly adjusted or pinched.
2. Idle adjusting ***** needs to be backed off.
3. Intake system air leak.
4. Fast idle choke ramp is not releasing.
5. Broken throttle return spring.
6. Carburetors need to be sync.
For more information about your issue and valuable "FREE" downloads that you will need please visit the websites below. Good luck and have a nice day.
carb high idle problem
high idle when engine is hot
OEM parts for Yamaha

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The problem is more likely that the gas has varnished inside the carb. Mine did the same thing and I cleaned the carb and it ran great afterwards.

Now I have the carb off again because someone dumped a bag of sugar into my gas tank and it got sugar all through the system and into the carb and engine. I couldn't believe how much sugar is in there. Now I'm trying to find a diagram or schematic to show the exact set up for reinstalling the choke and throttle linkage and the spring with the throttle.

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I have a 1980 yamaha xs 1100 special, it sat in a garage for 3 years, i replaced the fuel lines, cleaned the tank, and replaced the plugs, how come it only idles when the choke is on and it sounds like a...

You probably have varnish build up in the carburetors, causing restricted air flow, and therefore the engine is running too lean, especially on the right side, and a lean running engine will run hot at the exhaust. It only idles when the choke is on because the choke creates a richer fuel supply. A can or two of commercial fuel cleaner through the fuel supply may get the engine's jet's orifices cleaned out. Otherwise, overhaul the carbs.
Hey, nice old bike, though. Good luck

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3 Answers

Motorcycle idles up to 3,600 rpm warm at stops , no tension on throttle. Carbs just overhauled. Starts and idles fine cold. I use the brakes and downshift to lower the idle speed, then when I come to a...

Did you do the work on the carbs? Do you have the equipment and expertise a pro uses to balance the carbs? If you had this done by a pro, take it back amd make them fix it.

You are right, this is dangerous and expensive. I suggest you have a Yamaka shop take a look at your motorcycle.

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1 Answer

I have a 1991 toyota corolla which was left for 10 months in the garage. when I came back the carburetor got stack-up and need to be overhauled and the bushing of the starter needs to be replaced. Then...

If it starts fine when warm but not when cold it sounds like the choke is not coming on , Get who ever repaired the carb to fix the problem as they have not done what you paid them for.
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