Bttatro 94 #1 Posted October 27, 2017 (edited) I have a 7hp tecumseh pull start on my tractor and it was running and driving for the first time in several years this summer. Now I can't get it to start at all. The plug was fouled so I replaced it. I also cleaned the carb really well. I am getting spark, but even with sharing fluid it won't fire. What am I missing? What should I try? I am using premium gas and the gas line is also new and the filter in the tank looks good also. Any help would be appreciated! Edited October 27, 2017 by Bttatro Share this post Link to post Share on other sites
KC9KAS 4,744 #2 Posted October 27, 2017 Maybe the key is bent or even sheered. You would get "spark" but the timing would be off and it wouldn't "fire". I had that happen with a HH60 on a 654. 2 Share this post Link to post Share on other sites
pfrederi 18,333 #3 Posted October 27, 2017 Pull off the recoil start. You can usually see the keyway groove in the crank and the flywheel ...they should be perfectly aligned. Also remove the plug and turn the engine over with your finger on the plug hole, you should feel compression, stuck valve and/or compression release failure are also possibilities 2 Share this post Link to post Share on other sites
KC9KAS 4,744 #4 Posted October 28, 2017 @Bttatro Be sure to let us know what you find out! Share this post Link to post Share on other sites
Bttatro 94 #5 Posted October 28, 2017 I will try to get at it tomorrow, if not I took a week off work, so I should get to it soon. Share this post Link to post Share on other sites
Retired Wrencher 5,648 #6 Posted October 28, 2017 Bttatro it is like KC9KAS said the key way is very important to the timing. I have the # for it if you need it. Timing is easy also as long as you have a magnetic base for the dial gage. I have the process for that also if needed. Good luck and enjoy the project. Share this post Link to post Share on other sites
Bttatro 94 #7 Posted October 28, 2017 @Retierd Wrencher Any info you have would be great. Thanks everyone. Share this post Link to post Share on other sites
stevasaurus 23,065 #8 Posted October 28, 2017 My 502 with the pull start was hard starting after it sat for a few weeks. Got tired of pulling on the cord. I got the feeling if I could pull it longer and harder, it would start. I lined up my 857 to the 502...face to face, and off set so the engine pulleys lined up. Used a long fanbelt and figure 8ed it between the pulleys. With the 857 running, I just had to push the horses apart to tighten the belt and the 857 was cranking the 502. It didn't really take much doing that to get it started, but it sure saved on my arm. If I started that 502 everyday or so, it would start with about 2 pulls. 2 1 Share this post Link to post Share on other sites
Retired Wrencher 5,648 #9 Posted October 29, 2017 19 hours ago, stevasaurus said: My 502 with the pull start was hard starting after it sat for a few weeks. Got tired of pulling on the cord. I got the feeling if I could pull it longer and harder, it would start. I lined up my 857 to the 502...face to face, and off set so the engine pulleys lined up. Used a long fanbelt and figure 8ed it between the pulleys. With the 857 running, I just had to push the horses apart to tighten the belt and the 857 was cranking the 502. It didn't really take much doing that to get it started, but it sure saved on my arm. If I started that 502 everyday or so, it would start with about 2 pulls. I agree with that Steve You told me that a while back when I had the 606/607 and the 657 I started them a few times a week made a difference. The 606 and7. where 1or2 pulls with new key ways and Timing was dead on. Bttatro It is raining today so a good day to help you out. 2 Share this post Link to post Share on other sites
squonk 42,534 #10 Posted October 29, 2017 20 hours ago, stevasaurus said: My 502 with the pull start was hard starting after it sat for a few weeks. Got tired of pulling on the cord. I got the feeling if I could pull it longer and harder, it would start. I lined up my 857 to the 502...face to face, and off set so the engine pulleys lined up. Used a long fanbelt and figure 8ed it between the pulleys. With the 857 running, I just had to push the horses apart to tighten the belt and the 857 was cranking the 502. It didn't really take much doing that to get it started, but it sure saved on my arm. If I started that 502 everyday or so, it would start with about 2 pulls. 1 Share this post Link to post Share on other sites
Retired Wrencher 5,648 #11 Posted October 29, 2017 (edited) Bttatro I hope this helps. Let us know if you have any questions. Dis regard this>>> MVI_0780.MOVMVI_0780.MOVI did not get all the #`s let me know what you would like to see I will redo them.>>>>>MVI_0780.MOVMVI_0780.MOV. Edited October 29, 2017 by Retierd Wrencher Share this post Link to post Share on other sites
