Question about Craftsman 20 hp 42 in. Deck Lawn Tractor - CA Model

1 Answer

Will crank but won't fire

My dyt 4000 18.5 hp 42 inch deck will crank but won't fire. I have changed the plug,air filter,& fuel filter. HELP Please

Posted by on

  • Anonymous May 20, 2009

    Mine quit running abruptly and hasn't start since. It seems to be getting fuel but no fire to the plug

×

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

To run, the engine needs fuel/air mix, compression, and a spark. See if you can narrow your problem down to one of these. Remove the plug, then connect the plug wire and set (or carefully hold) the base of the plug against the cylinder head. Crank the engine and see if there is a spark. If not, the problem is in the ignition system.
If you see a spark, replace the spark plug. Remove the air filter and pour about a tablespoon of gasoline down the carburetor throat. Crank the engine, being careful to stay away from the carburetor in case it backfires. If the engine fires and runs, then it probably is not getting gas (fuel system problem), or not getting enough gas (carburetor or choke problem).
Compression problems are less common, unless the engine has been abused somehow. You can check for compression with a compression gage. Remove the spark plug, install the compression gage in the spark plug hole, then crank the engine with the throttle open and the choke off. If you get at least 60 or 70 psi when you do this test, the compression is probably not the problem.
.

Posted on Aug 15, 2009

Ad

1 Suggested Answer

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

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Craftsman silver won't start


ground the spark plug to the engine block it should spark. sounds like you need to check the valves and push rods

Jul 04, 2017 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

1 Answer

Poulan pro wont crank with air filter in it


Does it crank ok with filter out? If not remove plug, if turns over ok.

Jul 30, 2012 | Poulan 42-Inch Steel Deck 17.5 HP Briggs &...

1 Answer

Describe your 20 Hp 42"


The float an needle are stuck open causing the fuel to drain from the tank or be pumped by the fuel pump into the carburetor bowl, filling it and flooding the engine and filling up the air cleaner. You may even find that it has gone into the crank case sump contaminating the oil. Do not run until you have repaired the carburetor and changed the oil and if air filter got contaminated, that changed too.

I hope this is helpful for you.

Aug 18, 2011 | Craftsman 20 Hp 42" Deck Lawn Tractor

1 Answer

Poulan Pro 42" with 17.5


you need to find out if there is spark at the plugs

pull the plug put the wire back on hold it away from the engine then crank it over, you should see a nice blue spark arking from plug the engine body
If not then you need the start checking pug , wire , coil, or magneto wich ever your machine has

Jul 23, 2011 | Poulan 42-Inch Steel Deck 17.5 HP Briggs &...

1 Answer

The engine cranks fine, but it will not turn over


Pull the spark plug and test it for spark or replace the plug and see if it will start. You need three things to occur for any engine to run; Spark,Fuel and air. It seems the air factor is ok, not sure of the fuel factor based on the info provided and spark needs to be verified.

Jul 09, 2010 | Poulan 42-Inch Steel Deck 17.5 HP Briggs &...

1 Answer

Will start and run for a while then quits.


i am not a expert just trying to help you,, if crank and run for 10 to 15 minutes then shut off ,that sound like the magneto is getting hot (some call it a coil that makes the spark plug fire) it will crank and the same thing after a hour oor so of cooling down,,hope this help you

Oct 04, 2009 | Craftsman 20 hp 42 in. Deck Lawn Tractor -...

1 Answer

Runs for awhile then will quit


Have the fuel lines or engine shielding been modified at all? Has the fuel filter been changed?
If all of that is OK, remove the fuel line from the tank at the fuel pump, remove the fuel fill cap, gently blow air back through the fuel line so you can here bubbles in the tank. The "tank pre-filter" could be plugged.
Let me know.
Regards,

May 14, 2009 | Poulan 42-Inch Steel Deck 17.5 HP Briggs &...

Not finding what you are looking for?
Craftsman 20 hp 42 in. Deck Lawn Tractor - CA Model Logo

697 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...