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#16
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engine running fast...Briggs and stratton 35 classic petrol
"brian mitchell" wrote in message ... "S" wrote: "brian mitchell" wrote in message ... "S" wrote: having messed about with it a bit more I am still at a loss as to how to locate the springs... I have a B&S engine with two springs, one of which is much finer than the other. The heavier spring is the linkage between the throttle cable and the choke/main valve, the finer spring doubles up the linkage between the crankcase governor and the butterfly valve which it controls. Its ends just hook into the same holes as the wire link itself. Because there is a good deal of looseness in the wire linkage, the fine spring can act as a damper so that the governing action isn't jerky --just like Gary said! HTH brian mitchell I now have the springs correctly located but engine still running fast. Going to take the cover off and have a look at the complete assembly, everything appears to be free and not sticking so the only thing I can think of is the fan blades on the flywheel are not producing enough` blow` to push the governor which is unlikely or the spring on the linkage is to `tense` and therefore not allowing the governor to be blown back and operating the carb valve. I might try and put the likage on the other way round as this should reduce the tension on the spring, worth a try anyway. Just a speculative thought: on my engine the visible part of the governor consists of a shaft emerging from the crankcase with a lever clamped onto it. The wire link, with spring wound round it, goes from the end of the lever to the butterfly valve on the carb. I imagine the angle of that lever to its shaft is pretty critical so if it got disturbed it while dismantling/re-assembling, that could affect the speed setting. Is there any part of the governor mechanism inside the crankcase that might have become misaligned? Thanks Brian, I have since got a picture from `Briggs` showing the correct layout so I now know that is correct. Apparently where the other end of the spring locates (opposite from the linkage end) its a case of bending the metal tab to reduce or increase the tension on the spring. having done this I still think its running fast. I am going to take a video clip and some pictures and will post the links on here later, It will be interesting to see if others think its running fast or not. I have messed around with it that much even I am not sure any more. |
#17
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engine running fast...Briggs and stratton 35 classic petrol
Link to small video clip of engine running, I still think a bit fast.
Opinions welcome. http://s64.photobucket.com/albums/h1...=Videoclip.flv "S" wrote in message ... "brian mitchell" wrote in message ... "S" wrote: "brian mitchell" wrote in message ... "S" wrote: having messed about with it a bit more I am still at a loss as to how to locate the springs... I have a B&S engine with two springs, one of which is much finer than the other. The heavier spring is the linkage between the throttle cable and the choke/main valve, the finer spring doubles up the linkage between the crankcase governor and the butterfly valve which it controls. Its ends just hook into the same holes as the wire link itself. Because there is a good deal of looseness in the wire linkage, the fine spring can act as a damper so that the governing action isn't jerky --just like Gary said! HTH brian mitchell I now have the springs correctly located but engine still running fast. Going to take the cover off and have a look at the complete assembly, everything appears to be free and not sticking so the only thing I can think of is the fan blades on the flywheel are not producing enough` blow` to push the governor which is unlikely or the spring on the linkage is to `tense` and therefore not allowing the governor to be blown back and operating the carb valve. I might try and put the likage on the other way round as this should reduce the tension on the spring, worth a try anyway. Just a speculative thought: on my engine the visible part of the governor consists of a shaft emerging from the crankcase with a lever clamped onto it. The wire link, with spring wound round it, goes from the end of the lever to the butterfly valve on the carb. I imagine the angle of that lever to its shaft is pretty critical so if it got disturbed it while dismantling/re-assembling, that could affect the speed setting. Is there any part of the governor mechanism inside the crankcase that might have become misaligned? Thanks Brian, I have since got a picture from `Briggs` showing the correct layout so I now know that is correct. Apparently where the other end of the spring locates (opposite from the linkage end) its a case of bending the metal tab to reduce or increase the tension on the spring. having done this I still think its running fast. I am going to take a video clip and some pictures and will post the links on here later, It will be interesting to see if others think its running fast or not. I have messed around with it that much even I am not sure any more. |
#18
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engine running fast...Briggs and stratton 35 classic petrol
In message , S
wrote Link to small video clip of engine running, I still think a bit fast. Opinions welcome. http://s64.photobucket.com/albums/h1...=Videoclip.flv That's too fast but what happens after it's warmed up a bit? -- Alan news2006 {at} amac {dot} f2s {dot} com |
#19
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engine running fast...Briggs and stratton 35 classic petrol
I haven`t let run for that long in case I screw the engine.
What were you thinking of though? -- Rent a villa in Turkey http://www.freewebs.com/turkeyrent/ "Alan" wrote in message ... In message , S wrote Link to small video clip of engine running, I still think a bit fast. Opinions welcome. http://s64.photobucket.com/albums/h1...=Videoclip.flv That's too fast but what happens after it's warmed up a bit? -- Alan news2006 {at} amac {dot} f2s {dot} com |
#20
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engine running fast...Briggs and stratton 35 classic petrol
On Sun, 2 Nov 2008 13:26:12 +0000, Alan wrote:
That's too fast but what happens after it's warmed up a bit? Doesn't seem excessivly fast to me, may be a little quick towards the end of the run but the start seems about what ours runs at with the throttle set to "Hare". -- Cheers Dave. |
#21
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engine running fast...Briggs and stratton 35 classic petrol
"Dave Liquorice" wrote in message ll.net... On Sun, 2 Nov 2008 13:26:12 +0000, Alan wrote: That's too fast but what happens after it's warmed up a bit? Doesn't seem excessivly fast to me, may be a little quick towards the end of the run but the start seems about what ours runs at with the throttle set to "Hare". -- Cheers Dave. I think still a tad fast but an improvement. Now that I know where the springs are located I think tomorrow I will take the springs off and run it to see what happens and just manually position the choke flap. If I get it to run a bit better then I think that will tell me its the springs possibly being too taut. Thanks goodness I dont need to cut the grass til spring, gives me time to mess around with it and get it right. |
#22
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engine running fast...Briggs and stratton 35 classic petrol
Problem now sorted...........
It was the metal plate (deflector) behind the governor blade that was bent, although the governor blade still operated the choke flap it was being restricted because it couldn`t go back far enough. So thanks to you guys for all the input and time to read all this. Much appreciated. -- Rent a villa in Turkey http://www.freewebs.com/turkeyrent/ "S" wrote in message ... "Dave Liquorice" wrote in message ll.net... On Sun, 2 Nov 2008 13:26:12 +0000, Alan wrote: That's too fast but what happens after it's warmed up a bit? Doesn't seem excessivly fast to me, may be a little quick towards the end of the run but the start seems about what ours runs at with the throttle set to "Hare". -- Cheers Dave. I think still a tad fast but an improvement. Now that I know where the springs are located I think tomorrow I will take the springs off and run it to see what happens and just manually position the choke flap. If I get it to run a bit better then I think that will tell me its the springs possibly being too taut. Thanks goodness I dont need to cut the grass til spring, gives me time to mess around with it and get it right. |
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