Posted By: Gary Benson
Lawn mower puffing smoke. - 09/08/22 07:04 PM
My Dad's old Craftsman runs good, but every so often it will blow a puff of blue smoke and choke down a little bit, then straighten out again. Any ideas?
Posted By: MnMan
Re: Lawn mower puffing smoke. - 09/08/22 07:06 PM
Maybe over filled with oil a little bit?
Posted By: Gary Benson
Re: Lawn mower puffing smoke. - 09/08/22 07:07 PM
That did cross my mind. I'll keep after it.
Posted By: Crowfoot
Re: Lawn mower puffing smoke. - 09/08/22 07:23 PM
Someone put a couple beans in the tank ?
You'd likely get a "puff" periodically.
Posted By: Trapset
Re: Lawn mower puffing smoke. - 09/08/22 07:26 PM
Maybe over filled with oil a little bit?
That’s my guess too. Half way up the cross hatches is best for a lot of small engines that may not always be ran on the level.
Posted By: white marlin
Re: Lawn mower puffing smoke. - 09/08/22 07:27 PM
Maybe over filled with oil a little bit?
That’s my guess too. Half way up the cross hatches is best for a lot of small engines that may not always be ran on the level.
what's that mean: "level"??
Posted By: Trapset
Re: Lawn mower puffing smoke. - 09/08/22 07:30 PM
Ha! That’s what the engines on my mud motors ask!
Always up and down.
Posted By: Oh Snap
Re: Lawn mower puffing smoke. - 09/08/22 08:28 PM
Try fuel treatment, Sea Foam for just one. I promise you more will follow…lol
Oh wait you wrote blue smoke. Might be wrong answer!
Posted By: Northof50
Re: Lawn mower puffing smoke. - 09/08/22 08:29 PM
gas is leaking into the crank case when idle =raising the oil level = burn off = white smoke
water in the carb and a drop gets through = white smoke
Posted By: Oh Snap
Re: Lawn mower puffing smoke. - 09/08/22 08:35 PM
The Honda motor on my snow blower and several generators I have leak fuel into crankcase if the shut off valve is not closed. Smokey exhaust!
Posted By: GREENCOUNTYPETE
Re: Lawn mower puffing smoke. - 09/08/22 08:38 PM
if I tip my mower up to clear a jam then start it up again I can expect blue smoke for a few seconds
so over full , mowing steep slopes , when you put it up in the truck , ect could cause it
Posted By: Northof50
Re: Lawn mower puffing smoke. - 09/08/22 08:58 PM
The Honda motor on my snow blower and several generators I have leak fuel into crankcase if the shut off valve is not closed. Smokey exhaust!
and soon to be rings going a scratching.
Posted By: Trapset
Re: Lawn mower puffing smoke. - 09/08/22 09:27 PM
You can smell the dip stick to see if the oils gassed up. If so, change oil asap. Don’t fill oil past 1/2way up the hash marks or half way between add & full.
Some Honda and Predator motors are bad for tank pressuring and overflowing carb if gas isn’t shut off and they are parked on the sun.
Posted By: Drifter
Re: Lawn mower puffing smoke. - 09/09/22 01:07 AM
Valve seats on older mowers come loose and will float around some causing oil to get into cylinder and burn.
Posted By: patfundine
Re: Lawn mower puffing smoke. - 09/09/22 02:18 PM
Is it a twin cylinder briggs with a double barrel carb? They were known for that if it is. The carb is an over complicated piece of junk. The o rings dry out and leak fuel into the carb causing blue smoke and what sounds like it's being choked. I have worked on a lot of craftsmans with that issue. We usually replaced the carb to fix the problem.