Throttle slows on its own

[vinnyfish1 9]

My 1984 c145 auto throttle moves backwards on its own , slowing the engine speed while mowing or blowing snow......It is so gradule  you cant hear or feel it......any ideas on why it is happening

[stevebo-(Moderator) 8,531]

Drill out the pivot point on the throttle and replace with 1/4 inch bolt and lock nut. Problem fixed.

[gwest_ca-(File Mod) 11,472]

When you increase the throttle speed the cable is pulling on the governor spring. You need enough friction in the lever pivot to overcome that tension so the lever stays where you put it. The bolt and Nylock nut works great because you can reach in there with 2 wrenches and adjust the tension as needed as it will continue to wear with use.

 

Garry

[vinnyfish1 9]

So your talking about the pivot on the Throttle lever ??? It has a rivet and a cam washer

[vinnyfish1 9]

^{Thanks Gary... I assumed it was related to the governor since it seems related to  the load  on the engine.. However I did not think about tension on the throttle lever ...Thanks}  

[varosd 1,185]

You might get away with just squeezing the big rivet with vise grips/pliers, might be a tight fit reaching in from behind the dash.

  If that doesn't work, just remove the plastic handle with claw hammer and block of wood to protect the dash (tip: use a heat gun to warm up the handle)

remove throttle from dash, use vise grips or use hammer on the rivet to create more friction. 

nut and bolt after you drill out the rivet is another excellent option.

[boovuc 1,090]

On my C-175, way back in the mid 90's I was STUPID enough to spray silicone on the throttle lever. S T U P I D !

I had to hold the lever up with a bungee cord for years until I used a needle nose vice grip to squeeze the rivets but it still loses some RPM to this day. It was just a little tight way back then.    

[bmsgaffer 2,053]

On my C-175, way back in the mid 90's I was STUPID enough to spray silicone on the throttle lever. S T U P I D !

I had to hold the lever up with a bungee cord for years until I used a needle nose vice grip to squeeze the rivets but it still loses some RPM to this day. It was just a little tight way back then.    

 

Hahaha, been there done that! (Twice I think)

[slammer302 2,156]

Is there anyway to fix this problem on the pull push style throttle levers?

[C-85 750]

I had this problem too and this is how I fixed it.  I made up a little lever to hold the throttle lever up out of stainless steel.  I don't use full power that much, but when I do, this keeps it there and works great!  Hope you find a solution that work for you

 

[gwest_ca-(File Mod) 11,472]

Is there anyway to fix this problem on the pull push style throttle levers?

I wonder if a 6" or more length of steel brake line could be slipped over the cable and then put a series of mild "S" bends in the tubing would create enough friction to hold the inner wire in position? May need to be 3/8" tubing to go over it and that would require a plier style of tubing bender. Just keep adding to the bends until you have enough. The tubing would end up zig-zag shaped if that makes sense.

 

Garry

[wheelhorseman 3,237]

I have done the bolt trick and it works good but putting more slight bends in the cable works good also