850ford 3 #1 Posted March 27, 2022 I recently replaced the Pto safety switch on 1980 C165 (#104680).It now starts fine,but engine quits when PTO is engaged .Could it be a .bad switch? Thanks Share this post Link to post Share on other sites
953 nut 52,812 #2 Posted March 27, 2022 It is probably the seat switch or the wires leading to it. 3 Share this post Link to post Share on other sites
953 nut 52,812 #3 Posted March 27, 2022 This drawing should be helpful, 1 Share this post Link to post Share on other sites
850ford 3 #4 Posted March 27, 2022 Would it still start with a bad seat switch? Or does the seat switch kill the engine only when PTO is engaged? Share this post Link to post Share on other sites
8ntruck 6,571 #5 Posted March 27, 2022 (edited) Yup. The seat switch kills the engine when the pato is engaged and the operator leaves the seat. The pto switch prevents the engine from cranking with the pto engaged. Jump the seat switch temporarily and see if the engine stays running when you engage the pto. Edited March 27, 2022 by 8ntruck 2 Share this post Link to post Share on other sites
850ford 3 #6 Posted March 27, 2022 Thanks,Ill check the seat switch 2 Share this post Link to post Share on other sites
1940willys 96 #7 Posted April 11, 2022 Switch's are manufactured two different ways. Normally On, or Normally Off. My guess is you installed the wrong type of switch. You want a normally off switch so that when you pull the lever to activate the implement the switch is turned on Share this post Link to post Share on other sites
850ford 3 #8 Posted April 11, 2022 Thank you for the reply-it was the seat switch.I changed the seat switch and it runs good now 1 Share this post Link to post Share on other sites
