MerCruiser MCM 3.0LX User Manual

1B - 2 - MAINTENANCE 90-816462 2-695
Maintenance Schedule (Continued)
To Be Done by Dealer
TASK INTERVAL
20–Hour checkup (NOTE 1) 20 hours
Seawater pickup pump - disassemble and inspect
Whenever insufficient seawater flow is
suspected. (if operating temperature
exceeds normal range)
Flame arrestor and crankcase ventilation hose - clean and inspect
Eh lhih
Stern drive unit oil - change
Eh lhih
Gimbal ring clamping screws - retorque to 40 lb. ft. (54 N·m)
Eh lhih
Engine alignment - check
E 100 h l hi h
Transom gimbal housing assembly swivel shaft and gimbal
bearing - lubricate
Every 100 hours or once yearly, which-
ever occurs first
Engine coupling, universal joint shaft splines - lubricate
(see NOTE 2)
Crankcase oil and filter - change
Ignition system - clean and inspect condition
Universal joint cross bearings - lubricate
Every 200 hours or once yearly, which-
ever occurs first.
Steering system - lubricate and inspect for loose, damaged or mis-
sing parts.
Sl Eh d
Electrical system - check for loose or damaged wiring.
Sl Eh d
Continuity circuit - check components for loose connections,broken
or frayed wires.
Saltwater: Every 50 hours or 60 days,
whichever occurs first.
Shift, throttle cables and linkages - lubricate and inspect for loose,
damaged or missing parts.
whichever
occurs
first
.
Freshwater: Every 100 or once yearly,
whichever occurs first.
Cooling system hoses and clamps - inspect for damage and deteri-
oration. Check hose clamps for tightness.
Engine exhaust system - inspect for damage, deterioration and re-
strictions. Check hose clamps for tightness.
Ignition system - check timing and adjust if needed.
O
Fuel filters - replace
O
Steering head and remote control - inspect and lubricate.
O
Quicksilver Mercathode system - test output
Once a year
Closed cooling coolant - test for alkalinity.
Once
a
year
Heat exchanger - Clean seawater section
Carburetor - inspect and adjust
Drive unit bellows and clamps - inspect
Closed cooling coolant - replace Every two years
NOTE 1: For a list of 20 Hour Check up maintenance items to be performed, see ”Important Information’ section of
this manual.
NOTE 2: Refer to ”Lubrication” later in this section for engine coupler lubrication and/or related information
Index

MerCruiser MCM 3.0LX Specifications

General

Displacement	181 CID (3.0L)
Horsepower	135 HP
Fuel System	Carbureted
Ignition	Electronic
Alternator	65 Amp
Cylinders	4
Aspiration	Naturally Aspirated
Horsepower @ RPM	135 HP @ 4800 RPM
Full Throttle RPM Range	4400-4800 RPM
Fuel Type	Gasoline
Cooling System	Raw Water Cooled
Oil Capacity	4.5 Quarts
Bore x Stroke	4.00 x 3.60 in. (101.6 x 91.4 mm)
Dry Weight	635 lbs