Fast idle adjustment

[hundee r1]

Guys, Ive noticed that when I pull up my fast idfel lever on the control box, there is alot of slack before the motor responds.

Im wondering, do I need to adjust this at the motor end of the cable, or is there adjustment inside the controls that warrent a pull down and inspection.

Also, is this adjustment seperate to the normal throttle control, cos that too has quite some movement at the control box beofre the motor responds


1992 90hp force, with quicksilver controls

 

[Nordin]

Re: Fast idle adjustment

Besure that you have the long springloaded connector at the throttlecable and the one with no springload at the shiftcable.
Throttleconnector must be springloaded to besure the shifter get in gear before the throttle starts to move.
This will end up with a smooth shifting/throttleadvance.
Adjust the connetor at the throttlecable so you have to move the ballstudsleeve about 1/4 in to put on the stud.
Shifterconnector should adjust just to fit the stud.

 

[hundee r1]

Re: Fast idle adjustment

Thanx Nordin!! I think I understand. I've only just put it all together and didn't "stretch" any locators to fit over the studs so I'm assuming that is the reason I have the slack. I didn't even notice one of the connectors is spring loaded, thanks!
Sync n tune this weekend, so il have a shot then.

 

[jerryjerry05]

Re: Fast idle adjustment

Don't mes with the shifter. Unless the cables were replaced.
The cable ends unhook from the motor end. Shift from F-N-R a couple of times.End in N.
Then adjust the shift cable to fit straight on. No slack either way.
Then the throttle end. Adjust it so it's just shy of going over the post. Then pull and put a bit of tension on connector and slide it over the other post.
Some motors didn't have the spring loaded connectors.
Pic of your connectors?

 

[Frank Acampora]

Re: Fast idle adjustment

That's mercury ignition so the engine is probably Mercury controls. There is no spring loaded throttle connector. Mercury cables connect directly to the engine. IF you change the idle speed using the idle stop screw, you MUST reset the cable. This is done by removing the clip holding them into the engine lower cowl and threading the black plastic (or brass) slug in or out on the cable.

MOST of the fast idle levers I have seen DO have a lot of slack before they start to move the throttle and need to be pushed hard against their stop to increase idle speed.

 

[hundee r1]

Re: Fast idle adjustment

Wow,ok. It's a rainy wet night here, 1030 pm. Went out and had a quick look with a torch.
I think frank is correct, I didn't pull anything apart , but it doesn't seem to have any spring loading on the throttle cable. But also doesn't have any clip holding either cable to the lower cowling?
As stated, controls have Quicksilver written on them, thus assume Mercury.
Maximum fast idle was a smidge above 2000rpm at maximum lift on the lever.

 

[hundee r1]

Re: Fast idle adjustment

Dug this out of the archives from prior of the rebuild:



Frank, by clips in the cowling, do you mean round brass boss's as seen in this pic? That makes more sense to me.

 

[Frank Acampora]

Re: Fast idle adjustment

Hmm! That's one I haven't seen yet. Apparently Merc used a lot of different ways to attach the brass slug to the engine. But, that brass "boss" as you call it, threads in and out on the cable to adjust. If it doesn't adjust, it was not meant for Force engines.

In all the late Force engines I have seen, there is a cast part of the cowling meant to hold those brass slugs

 

[Nordin]

Re: Fast idle adjustment

Frank is that connectors for Force engines? It looks like the old Mercury used in the 70.s and 80.s. But I have not worked on newer Mercury so i am not sure if they used them in the 90.s and 2000.s.
But I am defenetly sure this connectors was on old Mercurys because I have these on my 1972 4 cyl. 80Hp Mercury and my 1970 4 cyl. 50Hp Mercury.

 

[hundee r1]

Re: Fast idle adjustment

Hmmm, both cables have these Brass boss's , threaded to the outter of the cables, and are bolted to studs to be held in place. Diffrence being, these studs are on brackets bolted to the powerhead, not the engine cowling.

Il get pix 2morro in daylight now that all is much cleaner.

Does my high idle max rpms seem low?