Re: No fast idle/throttle cable adjustment
IF the throttle cable quick-connect is attached correctly, the spring loaded center slug will be pulled out about 1/4 inch in neutral. During operation, this PREVENTS the throttles from opening until the engine is fully in gear.
IN neutral with the shift locked out, this will also let the control handle move a good bit before the carbs start to open. This is normal. To some degree, you can adjust the amount the control handle moves by adjusting the amount of spring loading By threading on or off the control cable. More loading (screwed further ON the cable) will let the handle move more and less will let it move less until you get to the point where throttles start advancing at the same time as shift starts to move--This is not the best situation.
The neutral interlock tabs prevent the engine from over-revving in neutral. They only allow the carb butterflies to crack open and timing to advance a couple of degrees. HOWEVER: If the idle stop screw (for whatever reason) Is screwed in too far, then most or all of the travel will already be used and in neutral you may not be able to rev the engine at all. The cure for this is to sync the carbs and timing and to set idle correctly. (watch the video and read the sticky) IF after synching, you can not set idle without screwing the stop screw too far in, then the engine is sick. Do a compression test and check fuel delivery and ignition systems.
If the control handle moves too far for your comfort, then try a different hole in the lever inside the control box, assuming a US Marine box. Chrysler control boxes only have one hole, there is no adjustment.
