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Thu, Jul 22, 10 at 11:39
| i have not been able to free stuck valve.
so what is procedure to either replace or free valve? would i be able to just remove cylinder barrel from oil pan, or complete engine removal and dismantle? thanks jim. |
Follow-Up Postings:
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| Pull off the carb and valve/rocker cover. Chances are you will bend up the cover taking it off, so a GSV series valve cover (cast aluminum vs stamped) will work fine as a replacement. Spray the intake valve stem with carb cleaner through the intake port work it around from the rocker side. Some pull off the rocker and retainer to move the valve around. Eventually it will work free, give it a shot of lube on the stem and reassemble. To prevent this, stop using old/varnished fuel. This effects the newer engines as the valve clearances have been tightened up for emission purposes. Starting to see B&S engines as well with the same problem (when they aren't dropping valve seats), but thats another story. |
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| Most times it isn't even necessary to take anything apart other than popping off the airfilter. Spray through w/ the carb spray crank it over let it sit -repeat a couple of times and they usually function enough to run . Some follow through sprays once it is running a dab of Seafoam in the tank w/ some fresh gas goes along way. One poster was pulling his over w/the spark plug hooked up and hanging out of the block and found out that carb spray seems to be quite combustable.... |
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| thank you for quick reply: Depunisher and Tomplumb i had valve retainer and spring off vice grips on stem still stuck. i didnt want to break anything. after reading your posts and spraying thru intake and stem was able to turn and free valve, as you both predicted. purchased new gas this year,and already cut lawn must of been crap left in 5 gal. can. thanks jim. |
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