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Link to engine manual http://www.biodsl.com/fsm/Duraforce_Service_Manual.pdf

If the crank is rotating when you are trying to remove the big nut to remove the blade remove the spark plug and put rope into the cylinder until the crank will not rotate.

I bought a cheap induction tach for less than 11.000 dollars from China and it works good on my lawn boys. http://www.pennybuying.com/ebayp2/nEO_IMG_E218A(2).jpg Brand new Easy to install LCD digtal display Show both engine rpm and hours of operation Read up to 99,999 rpm Programmable...

I bought a cheap induction tach for less than 11.000 dollars from China and it works good on my lawn boys. http://www.pennybuying.com/ebayp2/nEO_IMG_E218A(2).jpg

I just bought 2 non working lawn boys for 20 dollars, a 8237 and a 7268. I change the coil on the 8237 and cleaned the gas tank and it started on the first pull and it ran beautiful. I checked the compression and it is 140 and my other 2 8237's are at 105 and 110. On the R7268 which started but...

I noticed that the rpm increased on the the engine and i tried to reduce the rpm by the collar and nothing happened. One odd thing is when i remove the air filter element the rpm dropped about 400 rpm. When i move the throttle from high to low nothing happens. The carb has a main jet adjustment...