Alpha 1 shift / throttle

[PeeWeeIV]

Hi, I have a 1989 4.3 with Alpha 1 and a Commander control. Everything runs fine, but when I shift from neutral into forward or reverse, the engine speeds up slightly just as the shift is made. This makes it awkward maneuvering around a dock. Both throttle and shift control cables are 1 year old, but lower shift cable is older (although it worked nice and smooth when I checked it). Could this be caused by the lower shift cable being worn inside the nylon sheath? Anything in the control that could cause this? Thanks for any advice- Steve

 

[kenny nunez]

Disconnect the throttle cable and shift the drive in forward to full throttle, then adjust the throttle cable at the anchor point on the manifold so that the carburetor is still at the idle position. Then shift to reverse to re check for idle position. There must be no movement from idle when shifting.

 

[achris]

Disconnect the throttle cable and shift the drive in forward to full throttle, then adjust the throttle cable at the anchor point on the manifold so that the carburetor is still at the idle position. Then shift to reverse to re check for idle position. There must be no movement from idle when shifting.

And destroy the cable or the control box when you shift it back to idle!

No, the CORRECT way to adjust the system is to do the shift cable adjustment, as per my video (in the link in my signature), then with the control box in the neutral position, adjust the throttle cable so it has SLIGHT pressure pushing the carburetor linkages to the idle stop.... If the engine still revs slightly when you shift, you may have some wear in the shift components in the control box.

The shift cable adjustment procedure checks for 'slop' in the lower shift cable, if you're worried about that...

Chris........

 

[PeeWeeIV]

Thanks for the reply. I did follow the video for shift adjustment (very well done and easy to understand). I'll double check everything. The idea of wear in the control components is probably the answer. Just wanted to make sure I wasn't missing anything. Thanks again, Steve