I have a 10 year old Crafstman (Briggs and Stratton) 1 cylinder rider
mower, and its done me well, but now if it struggles at all on long
grass, it gets hot and starts smoking. It smokes a little all the time
I've cleaned the air filter, is there anything else that I could check
before trashing it?
If it's burning oil and losing compression, it's basically toast.
Using a heavy oil may help a little for a short while, but once
they're that bad, there's little to be done.
Depending on the initial quality of the mower itself and what shape
it's in, could put a replacement engine on it, but cost of repair of a
relatively small horsepower engine is usually so near the cost of a
new one I'd not recommend that route.
Two t hings come to mind:
1) Remove the motor cover and clean the fins around the spark
plug. Actually, clean the entire outside of the motor. May not be
2) Change the oil, and put in Castrol 10 W 30. Castrol is the
only brand that quieted the rod knock in my last truck for more
than a couple days after an oil change.
If the motor continues to smoke, change the oil again. But this
time use two stroke gas mix oil in the crankcase (do not mix it
with the gasoline) and check the oil before you start the mower.
Every day you run the mower, check the oil first.
Christopher A. Young
You can\'t shout down a troll.
The engine has a round wire gauze mesh over the top, which spins round
with the engine. This I regularly swish around with my hands to clear
off the dust and crap that gets on there. Is there more to clearing
the 'fins' than this? Under the mesuh are fan-shaped spiral fins that
pull air down over the engine, and they look clean.
There are fins around where the sparkplug sits. Those fins
actually provide the cooling of the motor (with the assistance of the
flywheel blowing air across those fins(the item you are washing off))
I would use the mower till it dies. Changing the oil to a straight
30 weight is your best bet. The 10w30 types of oil are designed for
winter type temperatures, not for warmer days.
Use the 10w30 in your snowblower, not your mower.
If you find the motor burning oil, going to a heavier weight is an
Others may like the Marvel Myster Oil. (mix a little with your oil
there and give it a go.)
The fins you're talking about are on the flywheel, purely to move
air down past the fins on the head and block. Over years of use, some
debris generally gets past whatever strainer is at the air entry,
lodging between the housing and the top of the block/head fins. Which
kinda makes cooling difficult.
What others have suggested is to pull the sheet-metal housing off the
engine and blow/scrape/wire-brush the debris off. I'll bet you have
of cooked-on crud there, as indicated by the smoke.
On Apr 11, 9:30 am, firstname.lastname@example.org wrote:
I'm assuming (and betting) the smoke is from the exhaust not from
charring of external trash and the cleaning will be of marginal if any
benefit to his symptoms (although it can't hurt and is a good idea to
remove stuff in general).
It's hard to tell how long you mean by long grass or how much more it
gets hot or smokes then.
But the cooling fins around the spark plug have more to so with it
getting hot than do the spiral ones on the top. When it's cold you
can clean much of the junk out of those fins with flat screwdriver, if
it is too hard to take off the sheet metal cover above (which only has
about 4 bolts, one near the spark plug and one at each front cover),
you may be able to clean much of that with the same screwdriver.
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