Can anyone help please? When I was mowing, I ran over a largish stone.
The mower made a noise like the stone was whizzing around with the
blades then white smoke came out of the exhaust. When I stopped the
mower, I tilted it up (only slightly) to see if the stone was still
underneath, didn't see it but saw score marks where it had been. The
blades still move OK. When I started the mower again, it sounded like a
tin can and there was a bit of oil coming out of the exhaust. Have I
done serious damage? What should I be checking next? The mower is only 2
With oil coming out the exhaust after hitting a large rock, you have
serious damage and it isn't going to be cheap to fix. I'd try to get
a rough estimate over the phone on the repair cost range before
spending money on fixing it. If it's a low to mid-range mower, you
may be better off buying a new one and parting this one out on Ebay.
Start with the engine and tell them you hit a rock and it no longer
runs, all sales final, as is, etc. That usually gets people
interested. I'm amazed at what people will bid on crap like that on
That is probably not true. The oil coming out the exhaust is probably
caused by tipping the engine and getting oil into the crankcase breather
and then sucked into the engine. If the engine is running badly it is
probably because the flywheel key is sheared. Running the engine with a
sheared key will ruin it. Fixing a sheared key shouldn't cost very much.
Except that she said it still ran but sounded like a tin can. I'm not
sure what exactly "sounded like a tin can" means, but a sheared flywheel
key or the blade hitting some piece of sheet metal might sound something
like that to some people. Since there was no mention of excessive
vibration I would guess the crankshaft is OK.
I'm with Jim on this one but it is still possible that the crankshaft &
blade are bent.... a bent blade will sometimes compensate for the bend
in the crankshaft and the machine will run semi-true. If the blade is
replaced for a new one the vibration may become more apparent.
This is all dependant of what the machine is though..... if its a Honda
with a Rotostop Clutch the crank could be fine but the clutch could be
damaged causing the "tin can" sound? More information required please.
'Lawnmower World - The home of Quality garden machinery'
> It could be one of many to be honest, this was quite a generic chassis
> design that was fitted with different cutting decks, engines &
> transmissions and then fitted with various companies stickers!!!
> Stratton themselves but sold off.... this has happend to Murry a lot of
> times over the years!)
> (http://www.jungle-busters.co.uk )
i have found a bit of a sticker on one off the side panels and what i
can read from is as follows
dx 60 pinto mtd 6.5hp r
col lawn rider
i wounder if this will help in id of my mower a bit more but thank you
ery much any way
Maybe it only /looked/ like it was coming out of the exhaust at that time, and
it was actually the dust from the rock disintegrating. =)
What, in an air-cooled engine, do you think would cause *white* smoke coming
from an exhaust port? =)
When the only tool you own is a hammer, every problem begins to look like a
Pretty much the same mechanism. The smoke was the result of a slug of
oil getting through the crankshaft breather. To be any more specific
than that, would require knowing what sort of engine/mower this is. How
would you explain it?
The poster said she "only slightly tipped" the mower. She didn't
turn it upside down. I've tipped many mowers over on their side and
never had any white smoke come out. In fact, that is how you change
the oil on most of them today. The white exhaust smoke also appeared
right after hitting the rock while the mower was still running and
before turning it upside down. I don't see how hitting a rock,
accounts for oil getting into the combustion chamber, unless something
is broken internally.
Perhaps we'll hear back about how it turns out.
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