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Yamaha Break-in Procedure

Yamaha’s four-stroke outboard break-in procedure is clearly written in the Owner’s and Service Manuals. The same basic procedure has been used for many years. The boat must be operated under load, which means in the water, with a prop installed and unrestrained. The first 10 hours of operation should be run using the following running pattern:

1. First hour – run the motor at varying speeds up to 2000 rpm
(approximately half throttle if there is no tachometer).

2. Second hour – accelerate hard enough to put the boat on plane
(do not use full throttle) then back off of the throttle but keep the
boat on plane.

3. Next 8 hours – run the motor at all speeds but avoid continuous
running at wide open throttle for more than 5 minutes at a time.

4. After completing the 10 hours of break-in, commence normal

Why is break-in important? During break-in, the microscopic peaks created during the machining process are shearing off. This shearing action creates the desired surface finish for proper piston ring to cylinder wall sealing while leaving microscopic valleys for oil retention. The factory-prescribed break-in procedure has been formulated to properly load the motor which in turn generates the correct amount of powerhead temperature and combustion pressure required to ensure the desired surface finish.

During the break-in procedure, an increased amount of carbon and unburned fuel components may pass between the piston rings and cylinder walls. The increased amount of carbon and unburned fuel components could cause the oil to turn black faster than normal. The unburned fuel components could also cause a slight increase in oil level, which is why both initially filling the motor with oil to the correct level and checking the oil level are important.

Yamaha Warranty

Yamaha Y.E.S warranty extensions provide peace of mind to boat owners around the country. The warranty coverage protects you from expensive repair bills, provides protection around the country through a 2,000+ dealer network, increases the value of the engine, and even provides travel and recreational protection.


These warranties are transferable and there is no deductible. The coverage is uninterrupted, taking over as soon as the regular warranty expires.


TRIP reimburses up to $250 in travel-related expenses and up to $50 for towing reimbursement on covered repairs.


There are no repair deductibles involved with any covered mechanical breakdowns.


Enjoy increased value should you ever decide to sell your Yamaha.


Your Yamaha is covered no matter how far or how long you travel.


Yamaha will work directly with your dealership. You won’t have to file the claim or wait for reimbursement.


Save thousands on repair parts and labor costs. The cost of parts on one repair can easily exceed the cost of Y.E.S.

Yamaha Warranty
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