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Ignition Timing And The Flywheel Key


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23 replies to this topic

#16 olcowhand ONLINE  

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Posted July 31, 2014 - 04:11 PM

To ensure a good tight fit, when I tighten the flywheel nut to spec, then I get a large socket that will fit loosely over the nut & contact the flywheel.  I then take a brass hammer & give the socket a couple or 3 good firm whacks.  It's amazing how much further you have to turn the nut after this to get back to the spec torque on the nut.  Before I started doing this, I had new keys to fail at times.  Not one since though.


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#17 larrybl ONLINE  

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Posted August 01, 2014 - 12:47 PM

the little 2hp flywheel did not have a nut, it was only heald on with the ratchet clutch. I did find a tool that allowed me to tighten it better, but wacking it was out of the question. My Daughter is using it, and I assume it is still running as it hasn't come back to me yet.



#18 Husky OFFLINE  

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Posted August 02, 2014 - 10:43 AM

They make a flywheel wrench that holds the flywheel in place so that you can take the nut off/on. I got one like this this they come in different sizes. There are different styles too. 

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#19 larrybl ONLINE  

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Posted August 02, 2014 - 08:34 PM

They make a flywheel wrench that holds the flywheel in place so that you can take the nut off/on. I got one like this this they come in different sizes. There are different styles too. 

That still doesn't help tightening the clutch to the flywheel, the only thing to grab on to is the two little tabs used to fasten the debris screen to.



#20 GTTinkerer OFFLINE  

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Posted August 03, 2014 - 12:53 PM

That still doesn't help tightening the clutch to the flywheel, the only thing to grab on to is the two little tabs used to fasten the debris screen to.

Most of the newer ones I have ran into also have two wider tabs on the starter clutch and even the new aftermarket ones I have ordered for older engines have the wider tabs.

I use brake cleaner to clean the crankshaft and flywheel mating surfaces to insure they are absolutely oil free before installing and torquing the clutch.


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#21 larrybl ONLINE  

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Posted August 03, 2014 - 02:39 PM

Well, it's still running so I guess I got it tight enough.



#22 Bud W ONLINE  

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Posted August 08, 2014 - 02:55 PM

My son used to race gokarts and the engines  were Briggs & Stratton 5hp burning methanol. They used an offset shear key to advance the timing to get the alcohol to burn along with some carb work. Those stock engines made 5 hp @3700 rpm. The guy I got my race engines from has a dyno and he could get over 10-1/2hp @ 6100rpm!



#23 framesteer OFFLINE  

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Posted August 10, 2014 - 10:28 PM

My dad made an "adaptor socket" to tighten the starter clutches on Briggs engines.  It was simply a short (2" long) piece of pipe that would fit over the outer diameter of the clutch, with slots to allow for the tabs that hold on the starter screen.  On the other end of the pipe, a flat plate was welded on, with a 1/2" square hole in the center to attach a 1/2" ratchet wrench or a 1/2" torque wrench. 

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#24 Husky OFFLINE  

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Posted August 11, 2014 - 11:29 AM

That is a really neat idea.






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