Mercury Mariner 4, 5 102CC Sail 1990 Outboard Service Shop Manual, Page 154Get this manual
SHIFT CABLE INSTALLATION and ADJUSTMENT If remote contro has neutral lock release (a)secure the release in the depressed position using piece of tape, as shown Now you can locate the true neutra detent
Check shift cable adjustment as follows:
To avoid accidental starting, which could result In per sonal injury, remove and Isolate high tension spark plug lead from spark plug before working near pro pelleraPlace remote control handle to fullForward" posit ionbTry tu rn ing propeller by hand, propeller should not rotate more than 90 deg rees in eit her directionwithout firm catch If firm catch is not fe ltadjust shift cab le clevis closer to shift cab le anchor bracket and repeat Steps "a" andb" Move remote control hand le toNeutraldetent positionPrope ller should now rotate free ly in either direction without catc hesIf the precedi ng is not attai nedadjust shift cable levi further away from shift cabl anchor bracket and rep eat Steps "a" thru "c"d While rotating propeller, move remote control handle to fullReverse" posit ionPro peller should not rotate more than 90 degrees in either directionwithout firm catch If irm catch is ot feltadjust shift cable clevis further away from shift cable anchor bracket and repeat Steps "a" thru "d" eMove remote control handle toNeutra'" detent positi onPropeller should rotate free ly in either direction, without catchesIf the preceding is not atlainedadjust shift cable clevis loser to shift cable anchor bracket and repeat Steps "a" th ru "e"Tighten "jamnut against shift cable clevis