PT422 Engine shaking / sputtering
- Thread starter KMA
- Start date
- Views: 27117
washita
Silver Member
- Joined
- Feb 24, 2009
- Messages
- 228
- Location
- south western michigan
- Tractor
- pt 425, JI Case, Gravely Comm.10A
unfortunately you have to remove the plastic cover that shrouds the flywheel to access the ground wire for the coil on the left side. when I took mine apart I removed enough of the plastic shroud to access the nut on the crank with a deep well socket, then replaced the missing shroud piece with a plastic cap that snapped into place. when I check my valve lash I no longer have to pull the shroud off the flywheel IE; time saver.
MossRoad
Super Moderator
- Joined
- Aug 31, 2001
- Messages
- 57,522
- Location
- South Bend, Indiana (near)
- Tractor
- Power Trac PT425 2001 Model Year
Now I had to ask myself "How in the heck can someone put a sparkplug in backwards?" and then after reading it about three more times I realized you meant the coil! :laughing:
BobRip
Elite Member
They can work when cold and fail when hot. Mine was erratic at first and then got worse.
BobRip
Elite Member
Yes, or a loose connection vibrates and does not make a good connection.
Gravy
Platinum Member
Check your valve clearances. Mine tightened up well before the recommended adjustment interval.
Heck, check to see that a rocker arm hasn't come adrift. That's been reported once or twice, and could account for all of your symptoms.
Heck, check to see that a rocker arm hasn't come adrift. That's been reported once or twice, and could account for all of your symptoms.
stray
Platinum Member
- Joined
- Jan 18, 2004
- Messages
- 709
- Location
- east TN
- Tractor
- Power-trac 422 2003 model and 428 January 2015 model
Tell us more about setting the valve clearance. I have close to 1200 hrs on my robin 22 hp engine and have never had the valve covers off. I am starting to hear some clatter though. What are the settings and the procedure for setting them or where do you find these procedures? Sometimes piston slap can be confused with valve clearance chatter. I hope that is not what I am hearing. Although it is not that bad. I have had motors that were running good sound much louder.
bjustice
Bronze Member
Google Robin engine for a downloadable service manual, covers EH 63, 64, 65, and 72. Also has parts manual for download--all free. Covers everything pretty well. I was just there due to a rocker arm stud which became loose on my PT2422 (25)hp. Everything OK now.