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MerCruiser Engines Service Specialists
Lake Conroe Marine, LLC
Sterndrive-Inboard-Outboard Repair
 Lake Conroe Full Service Boat Repair Shop
Service & Parts....936-890-0676

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Lake Conroe Marine stresses the importance of regular maintenance for your outboard motor. If we do the maintenance or if you do it, checking the items below will help extend the life of your outboard motor and give you many hours of trouble free boating. Each different engine has some specific situations that need service and you should check your owners manual if you perform the service yourself. This list is intended as a guide line only and your owners manual for your engine is the final authority.

Preventative Maintenance Check List For Your Outboard Motor

Maintenance Item

Each
Use

As Needed

20 Hour
Check

Annually
Or Every
100 Hours (1)

Anticorrosion Anodes

I

R

 

I

Battery Connections

I, T

 

 

I

Engine Warning System

I

 

 

I

*Safety Items

 

 

 

 

*Emergency Stop Switch & Lanyard

I

R

I

I

*Mounting Hardware, Clamp Screws

I, T

I, T

I

I, T

*Fuel & Oil System Components

I

R

I

I

*Steering Friction

I

A

I

I

*Steering Cable

I

L

I, L

I, L

Rinse & Flush (Salt Water Use)

P

 

 

 

External Finish - Wash & Wax

 

P

 

P

Lubrication Points (grease) (2)

 

L

L

L

Propeller & Propeller Shaft

 

 

 

I, L

Gearcase Lubrication

 

 

R

R

Power Trim & Tilt Fluid

 

 

I

I

Power Steering Belt, Fluid & Filter

 

 

I

R (500 hrs)

Tune-Up

 

P

 

P

Decarbonize Pistons

 

 

 

P

Spark Plugs

 

R

I

I

Ignition Wires

 

 

I

I

Fuel Filtering Servicing

 

 

P

P

Engine Operating Temp-Water Pump (3)

 

 

I

I, R

Electrical Connectors

 

 

I

I

Cylinder Head Screws

 

 

T

T

Fasteners, Screws, Nuts & Clamps

 

 

I, T

I, T

**4-Stroke Engine (Additional Items)

 

 

 

 

**Engine Oil Level

I

 

 

 

**Engine Oil & Filter

 

 

R(10 hrs)

R (200 hrs)

**Valve Tappets

 

 

I(10 hrs)

A (200 hrs)

**Timing Belt

 

I (100 hrs)

 

 

**Low Pressure Fuel Filter

 

R(400 hrs)

 

 

**High Pressure Fuel Filter (EFI )

 

R(1000 hrs)

 

 

**O2 Feedback Compensation (EFI )

 

P (200 hrs)

 

 

Key: A = Adjust   I = Inspect   L = Lubricate   P = Peform    R = Replace   T = Tighten/Torque

Notes (1) Which ever comes first (unless indicated differrently)
           (2 ) Special frequency requirements-such as salt water use. Refer to owners manual.
           (3) Over heating caused by a faulty  "Water Pump" is one of the most common causes of
               outboard engine breakdowns.

*Click Here For Recommended Mercruiser Maintenance Schedule