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Crowley Marine: serving boaters for over 40 years Crowley Marine: serving boaters for over 40 years
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Lower Unit & Sterndrive Break-In Procedure

Crowley Marine

Note: Gearcase assemblies are shipped without oil.

  1. Fill unit with manufacturer's required gear oil to recommended level.
  2. Adjust RPM at idle to manufacturer's specifications.
  3. Proper shift adjustment is essential.
  4. Jumping out of gear: If the unit will not stay in gear, the clutch dog has probably been rounded off. Rounded clutch dogs are caused by, but not limited to, improper shift cable adjustment, inadequate shift travel, idle RPM too high, and/or shifting too slow. Rounded clutch dogs are not covered by warranty.
  5. Avoid full throttle starts.
  6. Do not operate at constant speed for extended periods.
  7. Shift into forward gear a minimum of 10 times during break-in, with moderate engine speed after each shift.
  8. Do not exceed 75% of full throttle during the first 5 hours of operation.
  9. During the next 5 hours, full throttle should not be maintained for long periods.

OMC and Mercruiser Sterndrive Service Notice:

When purchasing either an upper or lower assembly separately, the opposite piece must be disassembled and cleaned by the service center in order to validate the warranty. This provision is due to the cross contamination of the oil.

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Flat $3.95 Shipping on ALL parts orders

We offer shipping flat $3.95 shipping on ALL parts orders. (Complete Engines, Lower Units and Sterndrives excluded). In addition orders over $89 have reduced cost express shipping available in checkout.

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