Ah, yes. I have the instructions, and I see the label for Item #14 is "Screw, Throttle Stop."
I found a reference to it in the manual - Section 1, General Information, page 1-39 Line 6, Photo 8. There is not much detail on the adjustment. The tiller throttle cable adjusts the idle by rotating the ball trunion to lengthen/shorten the cable going to its attachment point. The remote control throttle cable also has a similar adjustable trunion, so I don't see why the same method is not used. I think I read instructions somewhere to adjust the trunion for correct idle speed.
I think the whole procedure would go like this:
Before beginning set the new Throttle Stop Screw so it is not interfering at all with the carb or idle adjustment. It should not be touching anything until after Step 10 below.
1. Remove the Shift Cable & make sure the transmission is in Neutral.
2. Remove the Throttle Cable from its attachment pivot pin.
3. Let the spring loaded pivot pin freely come all the way toward the closed idle position.
4. Adjust the Throttle Cable Trunion so the cable end slides directly over it's attachment pivot pin, so the pivot pin does not move at all. Close the cable end clip.
5. Follow the instructions for "Synchronization and Linkage Adjustment" on page 1-38. It's also called Sync & Link. It's described as follows:
6. Attach the "Throttle Shaft Amplifier" (a clip with a long straight wire) to the throttle shaft.
7. Open the throttle with the remote control until the throttle shaft just begins to move.
8. The single line mark on the Cam should line up exactly with the Roller (cam follower).
9. Back out the Follower Adjustment Screw until the throttle shaft is closed completely, then advance it until the throttle shaft just begins to move.
10. At this point the throttle cable trunion setting is allowing the spring loaded attachment pin to come all the way home, and the Sync & Link adjustment for the spark advance is set.
11. Now set the new "Throttle Stop Screw" at a guess point, so it is just raising the idle enough to let the engine warm up in gear, unencumbered in open water.
12. Set the idle as described on page 1-39 -- 675 RPM, then full throttle for a minute after warmed up, then back down quickly to 700-800 RPM & into Neutral -- engine should continue to run smoothly. If it stalls or backfires the Idle Mixture is too Lean; see carb mixture in Section 2. (I don't know what the symptoms would be to change the Throttle Stop Screw unless the RPM are now way off the 675 +/-25 in-gear spec.)
I assembled this procedure, so if I missed anything or something is wrong, please let me know. Wouldn't want to post incorrect information. Thanks.
