JohnD 145 #1 Posted September 20, 2020 Here's a video showing my fuel pump test on my 1983 KT-17. I think it looks adequate. Am I missing anything? Share this post Link to post Share on other sites
AMC RULES 37,196 #2 Posted September 20, 2020 Does it pump like that at the carb height too? Share this post Link to post Share on other sites
953 nut 59,969 #3 Posted September 20, 2020 10 hours ago, JohnD said: I think it looks adequate. That is more than adequate flow. 1 Share this post Link to post Share on other sites
JohnD 145 #4 Posted September 20, 2020 21 hours ago, AMC RULES said: Does it pump like that at the carb height too? Hmm, good question. It seems to run okay, It just takes a long time to start. When I ran this test I also checked the plugs and the PO had them gapped at 40+ mil. I dropped them back down to 0.030" and haven't noticed much difference. I'll buy new plugs just so I know my starting point. Share this post Link to post Share on other sites
953 nut 59,969 #6 Posted September 20, 2020 22 hours ago, AMC RULES said: Does it pump like that at the carb height too? The pump and carb. are at the same height on a KT so I guess it would. Share this post Link to post Share on other sites
JohnD 145 #7 Posted September 21, 2020 I thought about bringing the gap all the way back to 0.025" but I wondered if they were playing some trick (hotter spark?) with the bigger gap, so I brought it almost all the way back. The first start seemed much faster, but the following starts were still slow. I'll set the new plugs to 0.025" for sure. Back in the early '90s I used to run plugs with the Y-tip in a Yamaha engine; they seemed to foul out a lot less in a hotly tuned engine. I forget the brand. Are those still popular, or did they lose their appeal? Share this post Link to post Share on other sites
