Tach-a-matic 357 #1 Posted October 28, 2018 Hello fellow Horsemen How might I go about fixing the throttle so it does not creep from 100% back to 50%? Here is what its doing... Share this post Link to post Share on other sites
lynnmor 7,559 #2 Posted October 28, 2018 Common problem. There is a rivet where the throttle handle pivots, put a small high quality screw thru the rivet and then locking nut on the screw. Tighten till there is enough drag to hold the throttle in place. 4 1 Share this post Link to post Share on other sites
Digger 66 3,488 #3 Posted October 28, 2018 I'm not really sure but I'll take a stab at it and say the lever shaft probably pivots on a rivet that has loosened up over time . Drill out the rivet ad replace with a similar sized screw and either double nut it or use a Nyloc / aircraft style locknut . I'm sure the experts will have a better idea though .... 2 1 Share this post Link to post Share on other sites
Digger 66 3,488 #4 Posted October 28, 2018 Just now, lynnmor said: Common problem. There is a rivet where the throttle handle pivots, put a small high quality screw thru the rivet and then locking nut on the screw. Tighten till there is enough drag to hold the throttle in place. You just beat me Share this post Link to post Share on other sites
benji756 341 #5 Posted October 28, 2018 I was able to peen the rivet on my 520h to cure this problem, I used the ball end of a ball peen hammer on it. 1 Share this post Link to post Share on other sites
Tach-a-matic 357 #6 Posted October 29, 2018 Thank you fella's I will try one of these methods 1 Share this post Link to post Share on other sites
WHX?? 50,720 #7 Posted October 29, 2018 Some of the later models had a dimple at the WOT position to catch the lever and hold it at WOT. On some late model verticals the dimple was the only way to hold the throttle as the only way the maker wanted to run the hydro was full power up, mostly the cheaper disposable hydros. That dimple may be worn down. I tiny bit of weld then filed is one fix. if you have to replace the rivet with a screw as mentioned above use a wave washer in between the lever and bracket. 1 Share this post Link to post Share on other sites
c-series don 9,425 #8 Posted October 29, 2018 I too have a 416-H that does the same thing. Funny thing is that after it runs for 20 minutes or so the throttle doesn't creep down?! Share this post Link to post Share on other sites
WildHorses 393 #9 Posted November 2, 2018 Drill the rivet at the throttle pivot point with a 1/4" drill bit and replace with a 1/4-20 bolt and lock nut. You can adjust the torque on the nut to adjust how firm you'd like the throttle lever. This was a method the factory Wheel Horse people instructed our dealership to use after replacing throttle cables (with brand new cables) frequently and having creep reoccur within a short period of time. If you peen the rivet it will need to be done again in a short period of time, although it will work if you're in a pinch. 1 Share this post Link to post Share on other sites
doc724 925 #10 Posted November 3, 2018 If you use the method suggested by Wildhorses, put a belleville washer under the nut. This will provide a constant resistance to motion. A true Belleville washer is slightly cone shaped. This is different than a saddle washer which is cupped in only one direction. 2 Share this post Link to post Share on other sites
WildHorses 393 #11 Posted November 4, 2018 13 hours ago, doc724 said: If you use the method suggested by Wildhorses, put a belleville washer under the nut. This will provide a constant resistance to motion. A true Belleville washer is slightly cone shaped. This is different than a saddle washer which is cupped in only one direction. Yes, I like to use a washer also. I forgot to mention that. Share this post Link to post Share on other sites
