Hi guys! I'm starting a new thread for this issue as I need to have this fixed by my vacation next week so quick advice is essential to me! Thank you in advance to those that take the time to help me with this!
So after doing a tune up on my 1963 Evinrude Sportwin 10hp (SN: 10302E) I've noticed a throttle issue.
I replaced the ignition coils just before noticing this. The issue is that when my hand is on the throttle lever/arm and I turn it all the way to the LEFT (WoT) the throttle roller is only traveling about an inch or so down the throttle CAM. It makes it just barely past the black notch mark on the cam. The carb butterfly itself seems to just barely open. (Maybe you can see in the video).
At WoT like this I seem to reach about half of the max RPMs. I've tried this in all gears and it does not make a difference how far I can throttle it.
I did notice that the throttle butterfly linkage that connects all the way to the roller has some pins that aren't "tight" against other linkages. They have just the slightest amount of give before engaging.. but this is not accountable for the amount of throttle I'm missing. I know this just by simply pressing down on the throttle roller with my finger to reach higher RPMs.
So that's basically my issue! Logic tells me that I need that carb throttle roller needs to be adjusted in some way to move further up the cam.. or maybe the cam needs adjusted to be closer to the roller? Are either of these things possible though?
Let me know what you guys think I should do along with some instructions, if you'd be so kind! I'm a very novice mechanic and only know so much but I can follow direction well! Thank you so much!
Here's a video that I tried to capture showing the issue:
(The video starts with the throttle at WoT and you can see that as I give it less throttle it starts to starve for gasoline) does this look like the normal length the roller cam should travel?:
https://youtu.be/43DMjHe77Xs
So after doing a tune up on my 1963 Evinrude Sportwin 10hp (SN: 10302E) I've noticed a throttle issue.
I replaced the ignition coils just before noticing this. The issue is that when my hand is on the throttle lever/arm and I turn it all the way to the LEFT (WoT) the throttle roller is only traveling about an inch or so down the throttle CAM. It makes it just barely past the black notch mark on the cam. The carb butterfly itself seems to just barely open. (Maybe you can see in the video).
At WoT like this I seem to reach about half of the max RPMs. I've tried this in all gears and it does not make a difference how far I can throttle it.
I did notice that the throttle butterfly linkage that connects all the way to the roller has some pins that aren't "tight" against other linkages. They have just the slightest amount of give before engaging.. but this is not accountable for the amount of throttle I'm missing. I know this just by simply pressing down on the throttle roller with my finger to reach higher RPMs.
So that's basically my issue! Logic tells me that I need that carb throttle roller needs to be adjusted in some way to move further up the cam.. or maybe the cam needs adjusted to be closer to the roller? Are either of these things possible though?
Let me know what you guys think I should do along with some instructions, if you'd be so kind! I'm a very novice mechanic and only know so much but I can follow direction well! Thank you so much!
Here's a video that I tried to capture showing the issue:
(The video starts with the throttle at WoT and you can see that as I give it less throttle it starts to starve for gasoline) does this look like the normal length the roller cam should travel?:
https://youtu.be/43DMjHe77Xs