Question about Craftsman 17.5 hp 42 in. Deck Lawn Tractor - CA Model

1 Answer

Motor ran fine in evening next morning black smoke, backfires and will not run above idle

Last weekend my wife mowed on Friday evening and she says tractor ran fine, I went out Saturday morning and tried to start it and it made a banging noise and started backfiring and blowing black smoke, it also would not run higher than an idle. Checked plugs and they were black. These were plugs that I just put in this spring and probably only had 15-20 hours on them. I also checked the air filter it was relatively clean. Changed plugs and blew out air filter. Tried to start again. It ran smoother at idle but still would not run above idle and still blowing black smoke. Due to the fouled plugs and black smoke I am thinking carburetor. Or possibly the coil. Any ideas?

Posted by on

  • Fred Jul 30, 2013

    Tractor actually has a Briggs and Stratton 22HP OHV intek motor.

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Craftsman Master
  • 2,478 Answers

The bang noise. Check timing. The key holding flywheel in place.

Posted on Aug 14, 2013

Ad

5 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad
  • 146 Answers

SOURCE: Tractor wont start

For a small gas engine than won't start, think FAST -- Fuel, Air, Spark, Timing. You've replaced the filters and spark plugs and squirted in some starter fluid, eliminating the simple common fuel, air, and spark problems -- but I because of the backfiring I think your problem is in the timing -- like a sticking valve. Probably more than you want to tackle at home, but might not be as expensive as an engine replacement. Take it to a good small engine mechanic -- best bet is a lawn equipment shop that has been around many years. Drive a little farther to get to one if necessary.

Posted on Jul 03, 2010

  • 3911 Answers

SOURCE: My 24 hp 42 inch

Yes I would figure out who made the motor, B&S, Kawasaki, Kohler, Tecumseh are common. Go to their website, find your engine model number and get the valve clearances. Find a mechanical person in the neighborhood, avoid brothers-in-law, and give him a 12 pack of beer to adjust the valves for you. I think you will find your mower runs way better, backfiring will be gone. After 100 hours or 3 or so years you will note most of those companies recommend an adjustment. You most likely have a 2 cylinder and there are two small rocker covers near the spark plugs, Pull off the covers and the rockers will be exposed. Adjusting the gap between the rocker and the valve takes some skill and understanding of where the pistons are in relationship to the valve train and doing it wrong can be expensive. I know there are many videos on youtube if you want to take it on yourself.

Posted on Sep 13, 2011

stapes613
  • 6 Answers

SOURCE: Craftsman 26 hp Kohler engine 54

to be honest the enigne ahas a control that the left side must fire and run before the right starts to fire it sounds to me like you have a fuel issue possibly the carb. is gummed up and dirty.

Posted on Jul 28, 2012

BMRservice
  • 21 Answers

SOURCE: Ran fine. shut off. will not start. tries but backfires

It could be as simple as a sheared flywheel key and/or the valves needing adjustment. The OHV engines that come in lawn and garden equipment these days are notorious for being very picky about the correct valve settings, especially single cylinder engines. Another common problem involves the fuel inlet valve in the carburetor. Not the solenoid valve but the float valve inside - if it doesn't seat properly fuel will overflow the carburetor and enter the engine. Several bad things happen after that - the cylinder can get enough gasoline in it to lock the piston when you try to start it and that can result in the aforementioned sheared flywheel key. The gasoline will also get past the piston and into the crankcase where it dilutes the oil and the result is poor lubrication. one of the first components to suffer from the lack of lubrication is the camshaft, particularly the exhaust valve lobe, which wears down to the point that it does not open the exhaust valve far enough and the exhaust cannot be expelled fully on the exhaust stroke. The leftover gasses then escape from the engine through the carburetor when the intake valve opens, sounding like a backfire but rather than fire coming out the carb you get popping and raw gas blowing out the intake. Check your oil for the odor of fuel. If it smells like gasoline and, perhaps is inexplicably overfilled with oil according to the dipstick, plan on having the carburetor inlet needle and seat replaced, possibly the flywheel key replaced and probably the camshaft replaced. Keep your fingers crossed that it is just the valves needing adjustment.

Posted on Aug 19, 2012

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

It sputters and belches out large clouds of blue smoke


mine recommends using only detergent oil rated API service classification SG-SL. Sounds like an older model and the synthetic may be to thin. Try changing the oil to a SAE 30 to see.

Apr 24, 2016 | Garden

1 Answer

Why is my car hesitating and bucking hard at 50+mph?


is their black smoke at the tail pipe if their is to much gas

Apr 09, 2015 | 1987 Chrysler Fifth Avenue

1 Answer

My husband bought a 2011 Husqvarna YTH2348. I am the one that mows the grass. We had the mower serviced last week. We have a HUGE lawn and I mowed all but the orchard. The next day, I went out to finish...


Black smoke is generally indicative of a rich fuel system. whitish blue smoke is generally burning oil.
It sounds like there is something wrong with the fuel metering at full throttle. You might check that the mechanical compression release isn't coming on when you go to full throttle.

Aug 17, 2013 | Husqvarna Garden

1 Answer

Last weekend my wife mowed on Friday evening and she says tractor ran fine, I went out Saturday morning and tried to start it and it made a banging noise and started backfiring and blowing black smoke, it...


Black smoke would indicate it is burning oil, Has the machine been working on an incline.? check valve clearences. My guess is that oil is somehow getting into the cylinder.

Jul 30, 2013 | Craftsman Garden

1 Answer

12.5 hp craftsman runs fine for only the first 1/2 hour or so


You are so right, the coil has a small crack the opens up as it heats up. You know the old saying as metal heats it expands this causes a open circuit.

Aug 25, 2009 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

Not finding what you are looking for?
Craftsman 17.5 hp 42 in. Deck Lawn Tractor - CA Model Logo

163 people viewed this question

Ask a Question

Usually answered in minutes!

Top Craftsman Garden Experts

Wade Mobley
Wade Mobley

Level 3 Expert

462 Answers

Dean Gruber

Level 2 Expert

110 Answers

Roland W VanLue
Roland W VanLue

Level 3 Expert

486 Answers

Are you a Craftsman Garden Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...