Trim Tab Adjustment; Ride Guide Steering Attachment Extension Couplers - Mercury 150 EFI Service Manual

Trim Tab Adjustment

DUAL OUTBOARD - COUNTER ROTATION
INSTALLATION
1. Shift outboard into neutral and make sure ignition key is at "OFF" position.
2. Remove plastic cap from rear of driveshaft housing and loosen bolt and trim tab.
3. Position trim tabs of both outboards straight to rear of outboard, so that tabs are
aligned with gear housing centerline.
4. Tighten both trim tab bolts securely and replace plastic caps. No further adjustment
will be required.
DUAL OUTBOARD - NON COUNTER ROTATION INSTALLATION
1. Check trim tab position as follows:
IMPORTANT: Initial trim tab setting for both outboards should be straight to rear
of outboard, so that tabs are aligned with gear housing center line. Refer to "If nec-
essary, adjust trim tab as follows," following.
a. Operate boat at normal cruise throttle setting and adjust trim to optimum setting.
b. If boat pulls to the right (starboard), trailing edge of trim tab must be moved to the
2. If necessary, adjust trim tab as follows:
a. Shift outboard into NEUTRAL and make sure ignition key is at "OFF" position.
b. Remove plastic cap from rear of driveshaft housing and loosen bolt and trim tab.
IMPORTANT: Trim tabs MUST BE set in the same position on both outboards.
c. If boat pulls to the right, adjust trailing edges of both trim tabs to the right. If boat
d. Tighten both trim tab bolts securely and replace plastic caps.
e. Operate boat per "Check trim tab position as follows," preceding, to check trim

Ride Guide Steering Attachment Extension Couplers

Listed below are typical couplers available. Refer to the current Quicksilver Accessory
Guide for specific coupler lengths and part numbers.
Outboard Center Line Distance
22-1/2 in. thru 24-1/2 in.
(572 mm thru 622 mm)
23-1/2 in. thru 27-1/2 in.
(597 mm thru 699 mm)
26-1/2 in. thru 30-1/2 in.
(673 mm thru 755 mm)
30 in. thru 34 in.
(763 mm thru 864 mm)
33 in. thru 37 in.
(838 mm thru 940 mm)
90-883728 JULY 2001
right (when viewing outboard from behind). If boat pulls to the left (port), trailing
edge of trim tab must be moved to the left.
pulls to the left, adjust trailing edges of both trim tabs to the left.
tab setting. Readjust trim tabs, if necessary.
ATTACHMENTS / CONTROL LINKAGE
Required Coupler(s) Between Steering Eyes
12 (305 mm) Coupler
15 (381 mm) Coupler (Supplied with this kit)
18 (457 mm) Coupler
9 (229 mm) Coupler and 12 (305 mm) Coupler
(Connected together with coupler link rod)
12 (305 mm) Coupler and 12 (305 mm) Coupler
(Connected together with coupler link rod)
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