My 9 year old 6.5 hp B&S Intek lawn mower always has smoke coming from the exhaust after mowing. I usually have to add a couple of ounces (no more than 3) of oil after every 2 hours of mowing. Do you guys think the mower needs rings or what else would cause this??
What causes smoke?
- Thread starter pbm
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do you mean when it is still running or after you shut it off? does it smoke on startup? is the smoke blue or black?
It doesn't smoke at all while running but when shut down a blackish smoke comes from the muffler. I usually use straight 30 wt. but have used 15w40 and I top it up with whatever I have opened (anything from 10w30 to 20w50 but never 10w40).
Has the air cleaner been serviced lately?
Rickey
Rickey
smoking on deceleration usually means worn valve guides or rings. these parts CAN be replaced but its usually not cost effective to do so. most small engines do not have valve guide seals but it wouldnt hurt to pull the valve cover and check. while youre in there go ahead and adjust the valves.
if worn metal parts turn out to be the problem, youre best bet it so keep the thing topped off with oil and dont worry about it. it will consume a bit of oil but still last many more years before something breaks.
if worn metal parts turn out to be the problem, youre best bet it so keep the thing topped off with oil and dont worry about it. it will consume a bit of oil but still last many more years before something breaks.
I have the same 6.5 b&s engine that used to smoke like crazy while cutting my lawn, I pulled the mower from a trash pile and all it needed was a good cleaning and it ran.
I never changed the oil in the past 6 years since I got it.
It always smoked and needed oil every time I cut the lawn.
so over the years I added oil and it smoked, I thought pull the engine find the source, but it kept running and cutting the lawn.
why fix something that works? especially if it cranks up on the first pull every time.
over the years the smoking went away and so far this year it hasn't needed a single drop of oil.
I just cut my lawn today, starts on a single pull and uses half the fuel it used to use 5 years ago, I guess the engine is happy with the Amsoil I have been adding to it all this time, AME 15w40, after all this time the oil is still clean on the dipstick.
I never changed the oil in the past 6 years since I got it.
It always smoked and needed oil every time I cut the lawn.
so over the years I added oil and it smoked, I thought pull the engine find the source, but it kept running and cutting the lawn.
why fix something that works? especially if it cranks up on the first pull every time.
over the years the smoking went away and so far this year it hasn't needed a single drop of oil.
I just cut my lawn today, starts on a single pull and uses half the fuel it used to use 5 years ago, I guess the engine is happy with the Amsoil I have been adding to it all this time, AME 15w40, after all this time the oil is still clean on the dipstick.
does it have any external oil leaks? could oil be leaking onto the exhaust?
if it were my lawnmower I would leave it alone unless the engine is running poorly. just keep an eye on the oil level.
if it were my lawnmower I would leave it alone unless the engine is running poorly. just keep an eye on the oil level.
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