Question about Briggs & Stratton Briggs Stratton Vanguard V - Twin Vertical Ohv Engine with Electric Start 23 Hp, 1" X 3 5/32" Shaft, ModelNo. 386777 - 0036 - E1

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Engine starts fine, but once started revs ramp up and down on their own, both at full speed and at idle. Happens on both cylinders of model 350777 Vanguard V twin with OHV.

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  • johnfrisoli Apr 24, 2010

    Governor looks fine to me. Isn't there something inside the crankcase that moves the accelerator linkages? This is moving causing the revs to change. The revs ramp up to full and then drop slightly for a second and then ramp up again. This happens over and over in a steady pattern.

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Check the air filter and replace it if it is dirty or flooded with oil. That is the most common reason for your symptoms. Next change the fuel filter. IF neither of these things changes the situation, you will have to clean and rebuild the carburator. J.

Posted on Aug 09, 2010

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Check the governors settings, This item controls the idle and the rate of rpms for accellration

Posted on Apr 24, 2010

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My aprila rs50 starts fine and runs fine cold but if it heats up abit you pull the throttle and it sounds like its dieng


Instructions
    • 1 Park your RSV 1000R on a well-ventilated, level area, using its kickstand.
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    • 5 Rev the engine two to three times and observe the tachometer. The engine should return to a 1,250 rpm idle. Adjust the engine idle speed as needed, using the method described, then rev the engine again. Problems may exist within the throttle control, fuel-injection system or engine, if the engine idle speed will not hold steady at 1,250 rpm. Contact your local Aprilia service facility for assistance.
    • 6 Stop the engine, once you have obtained a steady 1,250 rpm idle speed.

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1 Answer

Engine starts and idles fine, but will not rev up (2001 Jeep Grand Cherokee 3.1 diesel auto)


If it was a fuel shortage the engine would rev but to limited speed. This is a lack of air to throttle body. Check for clogged air filter and all the piping and the throttle body.

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I have a CCR 3650 Snow Blower ,The engine is racing at idle. How do I adjust?


Try the spring on the governor. sounds like it's not hooked up, or extremely week. I rebuild and sell these all winter. I've had it happen a few times. Runs really good! but, will ruin the motor running over speed like that. There are adjustments- some have the spring on a long flange of metal so it can be bent backwards to add tension- it doesn't take much! If the motor starts to rev up and down and up and down, add a hair more tension. It there is too much tension it will stall out when you hit heavy snow.

Feb 01, 2011 | Toro Snow Blower Ccr 1000 Belt 715381...

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Hi Guys, Greetings from the middle of nowhere. I am currently in Tanzania on an African trip from Cape Town to Cairo, so finding an english-speaking mechanic seems impossible!!! The problem started a few...


try a new set of plugs in it first,,,,if you can get a compreshion test done on the engine check all the cylinders are the same compreshion if one is low or maybe two to gether are low you have a head gasket on its way to poping out

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1 Answer

High / low speed jets both turned into base completely, how many rotations out before fine tuning for performabce.


Hello:

>>The Following is the Instruction File for Setting the Air Mixture Screws. Any Input is Appreciated. The Procedure is the Same for 1 or 2 Mixture Screws, Just Use the Instruction File and Skip Over the Section with the Missing Mixture Screw ( Usually the H Mixture Screw).
>>Now Setting the Air Mixture Screws:
>>****Turn the Idle Air (L) and Main Air (H) Mixture Screws In Until SNUG **Do Not Jam** Then Reverse Both Screws 1 1/2 Turns. Set the Throttle Full Open, Start the Engine.
>>Turn the Main Air (H) Mixture Screw Clockwise Until Proper Revs are Obtained. **Carefully Use your Finger and Move the Governor Arm to Rev the Engine (on Chainsaws and Trimmers Use the Trigger to Rev the Engine) Until you Reach Max RPMs (on Chainsaws and Trimmers, the RPMs are Not Set to MAX. Set to Max and then Reverse the Setting Screw 1/4 or 1/2 Turn. If the H Mixture Screw is Set too High; the Engine will be Starved for the Oil in the Gas and Damage the Piston and Jug/Cylinder) and the Engine is Running Proper at Full Throttle Up a Grade and for Chainsaws and Trimmers they Do Not Bog DOwn Under a Load. Occasionally you May have to Turn this Counter Clockwise to Achieve the Proper Revs.**
>>Now Allow the Engine to Idle. Set the Engine Idle Screw (Not Idle Air) so the Engine will Stay Running if Required.
>>Now Set the Idle Air (L) Mixture Screw so there is No Hesitation when Rapidly Throttling from Idle to Full Throttle. Reset the Engine Idle if Required.****
Please, Do Not Hesitate, If I Missed Something or you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance.
Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Be Happy. Thanks.

Good Luck

Respectfully

jbridger (John)

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1 Answer

Do not have basic setting for 2 speed jet so engine revs up and down instead of constant speed.


>>The Following is the Instruction File for Setting the Air Mixture Screws. Any Input is Appreciated. The Procedure is the Same for 1 or 2 Mixture Screws, Just Use the Instruction File and Skip Over the Section with the Missing Mixture Screw ( Usually the H Mixture Screw).
>>Now Setting the Air Mixture Screws:
>>****Turn the Idle Air (L) and Main Air (H) Mixture Screws In Until SNUG **Do Not Jam** Then Reverse Both Screws 1 1/2 Turns. Set the Throttle Full Open, Start the Engine.
>>Turn the Main Air (H) Mixture Screw Clockwise Until Proper Revs are Obtained. **Carefully Use your Finger and Move the Governor Arm to Rev the Engine (on Chainsaws and Trimmers Use the Trigger to Rev the Engine) Until you Reach Max RPMs (on Chainsaws and Trimmers, the RPMs are Not Set to MAX. Set to Max and then Reverse the Setting Screw 1/2 or 1 Turn. If the H Mixture Screw is Set too High; the Engine will be Starved for the Oil in the Gas and Damage the Piston and Jug/Cylinder) and the Engine is Running Proper at Full Throttle Up a Grade and for Chainsaws and Trimmers they Do Not Bog Down Under a Load. Occasionally you May have to Turn this Counter Clockwise to Achieve the Proper Revs.**
>>Now Allow the Engine to Idle. Set the Engine Idle Screw (Not Idle Air) so the Engine will Stay Running if Required.
>>Now Set the Idle Air (L) Mixture Screw so there is No Hesitation when Rapidly Throttling from Idle to Full Throttle. Reset the Engine Idle if Required.****
Please, Do Not Hesitate, If I Missed Something or you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance.
Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Be Happy. Thanks.

Good Luck

Respectfully

jbridger (John)

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1 Answer

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1 Answer

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