Propeller Replacement; Spark Plug Inspection; Lubrication Points; Checking Power Trim Fluid - Mercury 30 Manual

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MAINTENANCE
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SPARK PLUG INSPECTION

Inspect spark plugs at the recommended intervals.
1
Remove the spark plug leads by twisting the rubber boots slightly and pull off.
2
Remove the spark plugs to inspect and clean. Replace spark plug if electrode
is worn or the insulator is rough, cracked, broken, blistered, or fouled.
3
Before reinstalling spark plugs, clean away dirt on the spark plug seats. Install
plugs finger tight, and tighten 1/4 turn, or torque to 20 lb. ft. (27 N·m).
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LUBRICATION POINTS

Lubricate Point 1 with Quicksilver or Mercury Precision Lubricants
Anti-Corrosion Grease or 2-4-C Marine Lubricant with Teflon
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Propeller Shaft – Refer to Propeller Replacement for removal and installation
of the propeller. Coat the entire propeller shaft with lubricant to prevent the
propeller hub from corroding and seizing to the shaft.
Lubricate Points 2 thru 7 with Quicksilver or Mercury Precision Lubricants
2-4-C Marine Lubricant with Teflon or Special Lubricant 101.
2
Swivel Bracket – Lubricate through fitting.
3
Tilt Tube – Lubricate through fittings.
4
Co-Pilot Shaft (Tiller Handle Models) – Lubricate through fitting. Move the
steering friction lever back and forth while lubricating.
5
Lubricate threads on transom clamp screws (if equipped).
6
Shift Handle (Tiller Handle Models) - Lubricate through fittings.
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LUBRICATION POINTS (CONTINUED)
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Steering Cable Grease Fitting (If Equipped) – Rotate steering wheel to fully
retract the steering cable end (a) into the outboard tilt tube. Lubricate through
fitting (b).
The end of the steering cable must be fully retracted into the outboard tilt
tube before adding lubricant. Adding lubricant to steering cable when ful-
ly extended could cause steering cable to become hydraulically locked.
An hydraulically locked steering cable will cause loss of steering control,
possibly resulting in serious injury or death.
Lubricate Point 8 with light weight oil.
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Steering Link Rod Pivot Points – Lubricate points.
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CHECKING POWER TRIM FLUID

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Tilt outboard to the full up position and engage the tilt support lock.
10
Remove fill cap and check fluid level. The fluid level should be even with the
bottom of the fill hole. Add Quicksilver or Mercury Precision Lubricants Power
Trim & Steering Fluid. If not available, use automotive (ATF) automatic
transmission fluid.
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GEAR CASE LUBRICATION

When adding or changing gear case lubricant, visually check for the presence of
water in the lubricant. If water is present, it may have settled to the bottom and will
drain out prior to the lubricant, or it may be mixed with the lubricant, giving it a milky
colored appearance. If water is noticed, have the gear case checked by your
dealer.Water in the lubricant may result in premature bearing failure or, in freezing
temperatures, will turn to ice and damage the gear case.
Examine the drained gear case lubricant for metal particles. A small amount of fine
metal particles indicates normal gear wear. An excessive amount of metal filings
or larger particles (chips) may indicate abnormal gear wear and should be
checked by an authorized dealer.
Draining Gear Case
1
Place outboard in a vertical operating position.
2
Place a drain pan below outboard.
3
Remove vent plug and fill/drain plug and drain lubricant.
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Gear Case Lubricant Capacity
Gear case lubricant capacity is approximately 14.68 fl. oz. (440 ml).
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WARNING
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