pfrederi 18,689 #1 Posted March 13, 2020 Been wrestling with my GTt-14 project. Engine has been overhauled .010 over .010 under crank. My Harbor freight spark plug tester that I have used for years would flash. But the engine wouldn't run right, popped while running and sometimes didn't want to start. Replaced the trigger, the coil, and finally the stator, different plugs and different plug wires. cleaned the carb a second time no improvement. All the components passed the tests in the manual, even would jump a spark from the wire to the plug at 1/16" not very powerful but there. Finally dug out my old Briggs and Stratton plug tester.. It didn't show any spark. Gave up and switched her over to battery points, saw spark in the tester. just did a trial run, she runs like a top. I have two other Breakerless tractors. one is on loan to my brother in NY the other is in winter storage they both run great. Can't wait to get it out and see if the other breakerless will jump the gap in the B&S tester. 3 Share this post Link to post Share on other sites
857 horse 2,588 #2 Posted March 13, 2020 (edited) 41 minutes ago, pfrederi said: Been wrestling with my GTt-14 project. Engine has been overhauled .010 over .010 under crank. My Harbor freight spark plug tester that I have used for years would flash. But the engine wouldn't run right, popped while running and sometimes didn't want to start. Replaced the trigger, the coil, and finally the stator, different plugs and different plug wires. cleaned the carb a second time no improvement. All the components passed the tests in the manual, even would jump a spark from the wire to the plug at 1/16" not very powerful but there. Finally dug out my old Briggs and Stratton plug tester.. It didn't show any spark. Gave up and switched her over to battery points, saw spark in the tester. just did a trial run, she runs like a top. I have two other Breakerless tractors. one is on loan to my brother in NY the other is in winter storage they both run great. Can't wait to get it out and see if the other breakerless will jump the gap in the B&S tester. MAN,,,I JUST GOTTAH SAY,,,,,,, LOVE RED SQUARE... BETTER THAN ANYYYY TV CHANNEL...... Edited March 13, 2020 by 857 horse 2 Share this post Link to post Share on other sites
Stepney 2,354 #3 Posted March 13, 2020 Old outboards and anything with a rotary magneto will really give you a run for your money in this regard.. Have had many an engine here with 'good spark' but nary a pop when cranked. An old engine I sawed wood with was a lot like that. Spin it over good with another engine and you were good until it was loaded to a point the RPM's dropped too much .. and it would simply stop running. 1 Share this post Link to post Share on other sites
ebinmaine 72,725 #4 Posted March 13, 2020 I'd be interested to see which piece you finally determine is bad.. 1 Share this post Link to post Share on other sites
pfrederi 18,689 #5 Posted March 13, 2020 35 minutes ago, ebinmaine said: I'd be interested to see which piece you finally determine is bad.. All of them passed every test.....Stator test is sort of if it isn't shorted its OK unless you do not have spark. I had spark just not enough apparently.. Share this post Link to post Share on other sites
ebinmaine 72,725 #6 Posted March 13, 2020 Forgive my lack of knowledge. Do the tests consist of yes/no results only? Or is there a basis in measurable quantity such as volts/resistance? Share this post Link to post Share on other sites
pfrederi 18,689 #7 Posted March 13, 2020 10 minutes ago, ebinmaine said: Forgive my lack of knowledge. Do the tests consist of yes/no results only? Or is there a basis in measurable quantity such as volts/resistance? Coil test has values. Trigger is go nogo. Stator is really a go nogo. 1 Share this post Link to post Share on other sites
