20-Hour Check & Break In Procedures
Warner's Dock Inc.
1020 North Knowles Avenue
New Richmond, WI

Service Description

20 Hour Service

Outboard 2-Stroke & 4-Stroke

1. Check charging / ignition / electrical systems.

2. Check fuel system.

3. Check drive system.

4. Check shift & throttle controls.

5. Check power trim & tilt system.

6. Engine oil and filter change on 4-stroke outboards

Please Contact Our Service Department For Current Costs Or Questions. 

Break In Procedure for 4-Stroke Outboards-All Horse Power

Your new engine requires a period of 10 hours break in so that mating surfaces of moving parts wear in evenly. Operate the engine in the water (in gear with a propeller installed) for 10 hours as follows. When breaking in the engine, avoid extended idling, rough water and crowded areas.


1st Hour

2nd Hour

3rd to 10th Hour

After 10th Hour

 20 Engine Hours

Throttle Position





Operate at any speed

No throttle restrictions

Change engine oil

Max. RPMs

Up to but not exceeding 2000 RPM

Approx. ½ 


Avoid idling for extended periods of time.

Only enough speed to

get the boat on plane and then only enough to keep boat on plane.

Avoid full throttle.

Avoid full throttle for more than 5 minutes at a time.

Operate engine normally.

Subsequent oil changes annually or every 100 hours. 

Change engine oil after the first 20 hours of operation.  After break in, change engine oil every year or every 100 engine hours.

Use the manufacturer’s brand 4 cycle oil only.

WDI recommends using a fuel stabilizer such as Evinrude 2+4 fuel conditioner every time you fuel up.

Bad gas is the cause of some of the most expensive repairs we see in our service shop. SeaFoam is a good cleaner but it is not a fuel stabilizer and it will NOT make fuel last longer.

Enjoy your new engine. An engine being used is a happy engine. Engines that go unused for long periods of time tend to have more problems. 

WDI thanks you for your business. Happy boating!

-The crew at Warner’s Dock