857lover 291 #1 Posted January 21, 2023 (edited) so i have been working on this engine for some time i’ve done a lot with it and it’s never ram quite right and i rebuilt the engine new valves new rings new pistion new connecting rod and such but it’s just not seeming to run quite right and it puffs out the carb when running and there seems to be a lot of carbon built up on the intake and exhuast valve and it probably has saw about a hour of run time it’s can be hard to start and dosent seem to rev up very high when pulling back governor arm and it’s not even snapping back do you guys think the engine could possibly be not timed correctly this was my first time rebuilding any engine what do you guys think i should look at IMG_1157.MOV IMG_1157.MOV perly Edited January 21, 2023 by 857lover Share this post Link to post Share on other sites
953 nut 55,280 #2 Posted January 21, 2023 Your ignition points set your ignition timing. Check to be sure your ignition points are set at 0.020". @prondzy did a great tutorial on engine rebuilds, check it out and be sure you followed the steps presented in the thread. 2 1 Share this post Link to post Share on other sites
moe1965 738 #3 Posted January 22, 2023 (edited) You mentioned new piston and rings was the cylinder re bored as well??? Also did you check the valve gap Edited January 22, 2023 by moe1965 More info 2 Share this post Link to post Share on other sites
857lover 291 #4 Posted January 22, 2023 1 hour ago, moe1965 said: You mentioned new piston and rings was the cylinder re bored as well??? Also did you check the valve gap yes it was bored .10 yeah the valves are new and the only was to adjust them is grinding the stem 1 Share this post Link to post Share on other sites
Pullstart 62,905 #5 Posted January 22, 2023 Timing marks lined up correctly too? 2 Share this post Link to post Share on other sites
TJ5208 1,824 #6 Posted January 22, 2023 5 hours ago, 857lover said: so i have been working on this engine for some time i’ve done a lot with it and it’s never ram quite right @857lover What does that mean. 1 1 Share this post Link to post Share on other sites
Blasterdad 2,692 #7 Posted January 22, 2023 10 hours ago, 857lover said: and the only was to adjust them is grinding the stem Did you do that? They have to be adjusted to spec. Are the throttle linkages in the correct holes in the carb & governer arm? Is the governer adjusted correctly? Was the ACR installed correctly? Points gap correct? Carb adjusted / working correctly? Just a list of things to check.... 2 Share this post Link to post Share on other sites
squonk 41,136 #8 Posted January 22, 2023 Did your cam look like this? Or this? 1 Share this post Link to post Share on other sites
moe1965 738 #9 Posted January 22, 2023 Only other thing I can think of is compression ring and wiper ring might be in the wrong groove or wiper ring or compression ring is upside down. I can't remember which one only goes in one way. I don't know if this would even make that big of a difference I might be way out in left field on this one. What was the reason you rebuilt in to begin with. What was it doing or not doing at that time..... Share this post Link to post Share on other sites
857lover 291 #10 Posted January 22, 2023 it’s the botttom one 1 hour ago, squonk said: Did your cam look like this? Or this? 1 Share this post Link to post Share on other sites
857lover 291 #11 Posted January 22, 2023 20 minutes ago, moe1965 said: Only other thing I can think of is compression ring and wiper ring might be in the wrong groove or wiper ring or compression ring is upside down. I can't remember which one only goes in one way. I don't know if this would even make that big of a difference I might be way out in left field on this one. What was the reason you rebuilt in to begin with. What was it doing or not doing at that time..... it would get oil on top of the piston when cranking 1 Share this post Link to post Share on other sites
857lover 291 #12 Posted January 22, 2023 13 hours ago, Pullstart said: Timing marks lined up correctly too? yeah i pulled off the bottom pan it is timed properly 1 Share this post Link to post Share on other sites
squonk 41,136 #13 Posted January 22, 2023 How did you set the points? Share this post Link to post Share on other sites
857lover 291 #14 Posted January 22, 2023 50 minutes ago, squonk said: How did you set the points? i set therm at about .20 1 Share this post Link to post Share on other sites
squonk 41,136 #15 Posted January 22, 2023 13 minutes ago, 857lover said: i set therm at about .20 I didn't ask where , I asked how. What timing mark did you use? Did you use a timing light. Meter? 1 Share this post Link to post Share on other sites
Pullstart 62,905 #16 Posted January 22, 2023 1 hour ago, squonk said: How did you set the points? 15 minutes ago, 857lover said: i set therm at about .20 there is a method called static timing, where you set the points to fire at TDC based on the piston location. If you don’t have the tools to do that, try .018” gap 15 minutes ago, 857lover said: 1 Share this post Link to post Share on other sites
857lover 291 #17 Posted January 22, 2023 5 minutes ago, squonk said: I didn't ask where , I asked how. What timing mark did you use? Did you use a timing light. Meter? used a meter 1 Share this post Link to post Share on other sites
