Posted September 29, 2017 - 12:25 AM
- 4APK.RU said thank you
Posted September 29, 2017 - 06:32 AM
Is it running OK or badly?.....If running OK, I would say the governor is doing its job and giving it what it needs throttle wise.
Posted September 29, 2017 - 09:58 AM
If the butter fly opened wide open with the throttle control set wide open and no load. it would mean the governor had failed. The governor keeps the throttle plate close to closed until engine load requires it to open to maintain RPM. Don
Posted September 29, 2017 - 04:24 PM
Make sure the air filter is not oil soaked or really dirty. And make sure you don't have any water or dirt inside the carb. 1 little drop of water laying in the bottom of the carb will give you problems.
Is the gasket still between the carb and plastic air filter plate? If it's not there the primer doesn't work very well.
Is the rubber O-Ring still in place? It seals between he carb and intake tube behind the carb.
Partly sheered flywheel key makes them run poorly also. Timing doesn't have to be much more than a hair off for them to sputter and carry on.
If the spring is stretched a bit you can bend the metal tab that it hooks to forward towards the head a little. That will give you a bit more throttle. Just don't bend it to much the governors are touchy. Go through the carburetor and make sure it's clean inside before adjusting anything.
Here I circled the tab that you can bend to get a bit more throttle out of it.
Bend it with your finger slightly forward towards the front of the mower. It's easy to bend. Just the part where the spring attaches that's circled in green.
Briggs quantum are good little engines and really simple to work on. Very rarely does the governor gear bad on them. I've had a bunch with blown connecting rods and big holes in the block but the governors were almost always intact.
Edited by EricFromPa, September 29, 2017 - 04:43 PM.
Posted September 29, 2017 - 04:46 PM
I have a 4 of these engines torn apart and 3 on mowers if you need Pics.
The ones I have torn apart have Bent crankshafts or were ran without oil but they all still ran.
Posted October 01, 2017 - 02:12 AM
Posted October 01, 2017 - 02:15 AM
Posted October 01, 2017 - 10:50 AM
Pictures of the throttle system might help get a response that solves your problem. Don
Posted October 02, 2017 - 02:38 PM
The last image is of the spring I have purchased to replace the old one seen in images, I can not purchase here in the uk so I’ve got to import from USA , some charge £10 which is about $15 so I’m thinking of trying to make my own springs
Edited by Torri gwair, October 02, 2017 - 02:42 PM.
Posted October 02, 2017 - 08:03 PM
I have looked at the pictures and not come up with a solution. To try to help I can only try to describe normal operation of a governor. In every governor I have worked on the governor arm was directly coupled to the butterfly. the operator throttle control is hooked to the throttle arm or butterfly by a spring. The spring pulls the butterfly open. the governor pulls the butterfly closed. If the engine is not running the spring wins and pulls the butterfly wide open. If the engine is running the governor pulls against the spring to close the butterfly. If you release the spring tension the butterfly should be pulled closed by nearly any rpm. If you relive the spring tension and the engine still goes wide open either the governor is bad or the linkage from the governor to the butterfly is wrong. Don
Posted October 03, 2017 - 05:32 AM
Posted October 03, 2017 - 06:10 AM
Posted October 03, 2017 - 06:15 AM
Posted October 03, 2017 - 06:16 AM
Posted October 03, 2017 - 06:54 AM
That sounds correct to me.