Straight 30 weight if you only use it in the summer. 10w30 if you operate in in cooler temperatures. Any major brand is fine. I personally use Pennzoil.
30W for summer
how to install a spring clutch on a murray mower
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what size belt do i need with a murray riding lawn mower that is a 12.5hp. 40"
10w30 will do.
SAE 30W
The spark plug gap for a Murray 12 hp riding lawn mower should be set at .020 inches. This is equal to .5 mm.
Genes lawn service carries some parts
most mowers run fine on 10W-30 automotive motor oil.
One reason why your Murray lawn mower may fade in and out when it's running could be the gas. It the gas was leftover from the year before, you may have to empty it and put fresh gas in.
if made by murray contact briggs and straton they bought out murray it worked for me
Try manualsonline.com or managemylife.com