Throttle friction adjustment

[jtexas]

'79 'rude 70hp, running good but throttle slowly backs off of WOT unless I hold it down. The other day while cruising at WOT I turned the friction adj knob about 1/8 to the right and she died, just like if I turned off the key. I reset the friction knob & she started back up & runs ok since but I have a nagging feeling that I'm not going as fast as before. Could be my imagination, I have no tach or speedometer. <br /><br />1. It still won't stay at WOT on its own - is that by design?<br />2. Is it possible the throttle cable slipped a tiny bit? I have the manual but having trouble understanding how to tell whether she's opening up all the way.<br />3. Any idea of how I killed the engine with the friction adj knob?<br /><br />thanks for the help,<br />jtw

 

[Joe Reeves]

Re: Throttle friction adjustment

The friction adjustment, regardless of the type of control box, is nothing more than a brake pad type device pressing against the throttle cam.<br /><br />If the engine cuts off (dies) when you attempt to increase the pressure, I'd suggest that you dismantle that control box to inspect that area.<br /><br />According to your explanation, it would appear that increasing the pressure of the friction adustment is causing the ignition to short out.