Question about Mercury Outboards - Zinc Merc Outdrive
I just replace my needle and gaskets in the carb. Now the idle is too high. I'm not sure which adjustment screw to use?
there should be a screw on the throttle body, if there is not replace throttle position sensor or the idle air control motor.
Posted on Sep 04, 2008
SOURCE: 1992 mercury topaz
I had the same problem. It was the idle air control valve. It sits on top of the intake just downstream from the throttle. There's a valve rod inside that gets worn over time and starts to stick. If that's what is causing your problem, you need to replace the unit.
Posted on Feb 09, 2009
The adjustment screws/nuts should be located either on the top of the headlamp assembly,
behind the headlamp assembly, or near the frame rail by the radiator
You will have vertical adjustment screws for each independent beam (separate highs and separate lows, but will be same screw if highs and lows are the same bulb). You may also have additional horizontal adjustment screws as well
Park your car on a level ground 30 feet from a wall and measure the height from the ground to the bulb and mark on a wall (do this for highs beams and low beams if the bulbs are separate, if highs and lows are the same bulb, only do it for the lows)
For Low Beams: If the headlights read VOR, then aim the brightest part or cutoff part just below the mark on the wall. If it says VOL or nothing, aim them 2 inches below the mark on the wall.
For High Beams (if separate from low beams): Aim the headlight directly at the line you marked on the wall.
Posted on Nov 04, 2009
There are usually 2 adjustable screws in the casing. They may be the same ones used to attach to the headlight support, but the headlight housing glides along the screw and travels along it to adjust the beam.
If you have anything left of your old unit, look at it. Sometimes the manufacturer provides an extremely small hex shape on the back of the screw. This type can adjust from the rear of the headlight under the hood and you use an extremely small socket to turn it.
There is often a rubber collar on this screw shaft that you can grip with a pair of pliers The rubber collar looks a little like a sink washer. Keep the rubber collar stationary and then turn the shaft and it will adjust.
Posted on Mar 30, 2012
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