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406777 valve setting - Briggs & Stratton Garden

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You have not indicated which motor you are talking about.

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Valve clearances are set by either tappet screws in the lifters or on a lot of small engines, clearances must be set by either cutting out valve seats with a special cutter tool (to DECREASE clearances) or grinding the end of the valve (to INCREASE clearances) and generally are from .008-.010 on intake valves and .010-.012 on exhaust valves. Check engine specs to insure proper clearances.

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Can I view the elctrical manual for a Scotts 406777 mower?


Does your owner's manual have a diagram?

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How do I set the timing


Are you trying to set the ignition or valve timing ? The ignition timing is factory set and changes with engine rpm - you can set the air gap between the flywheel and the ignition unit which should be around 0.25mm (0.010") Excessive air gap will retard the ignition timing. Unless you\'ve had the engine apart, the valve timing won\'t need re-setting. The valve clearances will need setting from time time and the clearance between valve and rocker is 0.1mm and is adjusted with both valves closed and piston at the top of it\'s stroke - you should replace the gasket and copper washer at the same time.

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Briggs & stratton mod. 406777-0115-E1 engine backfires thru exhaust


This is a true tale sign of a valve being out of adjustment or possible burnt or sticking. Most likely its just out of adjustment. Setting them to Book Specifications of: Valve Clearance (cold) IN and EX .005" (0.13 mm) should take care of the problem. Since you said that it runs fine rules out the possibility of a sheared flywheel key, though I have seen one run with it slightly sheared. Thanks; George

Apr 22, 2013 | Briggs & Stratton Garden

1 Answer

I have a John Deere riding lawn mower model # 406777, gas was put in the oil tank by accident. What do I do?


DO NOT RUN THE ENGINE IN THIS CONDITION

The solution is not too difficult here, but may be a little messy if you are not careful. You need to drain the oil/gas mixture into a container. CAUTION- the gas in the oil acts as a thinner and the mix will flow out very quickly so be ready to catch it in a container. Change the oil filter and refill with oil like normal oil change. Remove spark plug and rotate engine several times, this is done because the fuel in the oil washes the oil out of critical locations within the engine and rotating several times to put oil back on those critical surfaces. Reinsert plug and you are ready to start it up.

I hope this help you, if it really does please rate four thumbs up.

Jul 22, 2011 | John Deere Garden

1 Answer

Find tdc and adjust valves on a 325 i


With the tappet cover off, rotate the engine in the normal direction of rotation until you see #4 cylinder valves rock - open/close in succession. This will be TDC on #1 - set the valve clearances. Turn the engine until your see #2 valves rock, set #5 valves, turn the engine till #6 valves rock, set # 3 valves, turn the engine until #3 valves rock, set # 6 valves, turn engine till #5 valves rock, set # 2 valves, turn engine till #1 valves rock, set # 4 valves. Once you have located #1 TDC (the second mark in the pulley should be lined up with the cover mark), it is only 60 deg. to get to the next cylinder to set. If you accidentally go past the setting point, go back and approach the setting point again in the direction of engine rotation. When you come to setting # 6 the TDC marks should be aligned again.

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1 Answer

Apparently valve not working, how can I check it?


sounds as though the thermostatic radiator valve is stuck although the valve settings can be set to max. sometimes hitting the side of the valve will free the stuck spindle & get it working again.

If not a drain down of the system & a new valve fitted

Kindly

Richie

Dec 15, 2008 | Plumbing

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