I have actually a 2013 troy Bilt Pony 42" lawn tractor with the Briggs and also Stratton 17.5 engine. It does the point where as soon as i revolve the vital it turns a small stops in ~ compression transforms a little more stops again in ~ compression, etc. If i take the spark plug out and also turn the an essential it turns over normally. The battery is an excellent and every point I've learned through googling and also watching youtube videos claims to adjust the valves. I've changed both valves to .004 together one youtuber suggests, and to .004 intake and .006 exhaust as others to speak ). I've tried both settings several times and keep having the same problem when I placed the spark plug earlier in and also turn the key. Both the intake and exhaust enter and exit near the height of the valve real estate so I'm not particular which valve is which. One video I watched which to be for speak mowers in general and also not Troybilt Pony stated the exhaust valve is the one the is top top top and the intake valve the bottom one - is this correct?I do an alert a sulfur / rotten egg smell once I shot to start it - does this aid diagnose noþeles ?I'm in ~ a loss - any type of suggestions on what I might be doing dorn or even if it is it could be a problem other 보다 the valves prefer the solenoid or something would be greatly appreciated. :confused2:I occupational on my very own cars as soon as they require repaired (have excellent head gaskets, brakes, etc.) however this is the an initial time I've do the efforts to readjust valves.

You are watching: Adjusting valves on 17 hp briggs and stratton


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Briggs vertical room intake ~ above top. All of them. You watched the vids and turned the flywheel so they to be at the right position once you do the adjustments ??
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ILENGINELawn Pro
JoinedMay 6, 2010Threads26Messages8,025
Briggs single cylinder vertical OHV engine use a crossflow head, Which way the input is top top the bottom. If you are sure you have the valves readjusted correctly, then while transforming the flywheel slowly watch for the intake valve/ bottom to bump off seat slightly just prior to TDC compression. You could have a case where the flyweight ~ above the camshaft is broken and the compression release no much longer works, and will require replacing the camshaft.
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Scrubcadet10Moderator
Staff member
JoinedSep 24, 2017Threads178Messages4,993
I constantly thought girlfriend were supposed to set them 4 to 4? I'm certain I'm not correct though, and do friend think it could be the compression relax on the cam? more thane most likely not, but sometimes the spring will come off and also the CR won't work... Yet it does sound favor something in the head/ valve mechanism.....:smile:ILENGINE, that shouldn't need replacing the whole cam, simply the comp. Release. The is riveted in on many engines. However in some instances people simply go ahead on placed a new cam in, it's a many simpler.

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ILENGINELawn Pro
JoinedMay 6, 2010Threads26Messages8,025
I walk 4 end the summer this year. In all instances the decompression device was in about 10 piece laying in the sump the the engine. On part engines the valve clearances are .004-.006 for both on rather it is .004-.006 because that intake and also .005-.007 because that exhaust. For this reason most human being will just say 5 and 5.Briggs doesn't normally offer simply the decompression mechanism as a instead of part.
T
Tinkerer200Well-Known Member
JoinedMar 14, 2015Threads4Messages838
"ILENGINE, the shouldn't call for replacing the whole cam, simply the comp. Release. That is riveted in on most engines."Let me understand where to acquire the parts.Walt Conner