Check out this link to find the Mercruiser Vazer Marine Engine Specifications

Engine Spec’s

Mercruiser Engine Coupler Replacements

Question: When is the right time to replace the engine coupler?

Answer/Recommendation: Whenever the engine is out of the boat, and the coupler has more than 30 – 50 hours of service. There really isn’t a set standard for this however our rule-of-thumb is that if you don’t want to risk having to pull the engine back out of the boat to change a failed coupler, go ahead and change it while the engine is out. Installing fresh power in front of a worn out engine coupler will fail it in a pretty short amount of time.

Link to Engine Coupler Store Category…….New Engine Couplers

Because of the various engine manufacturing related test such as oil pressure testing, oil flow testing, spin torque testing, etc the assembly lubricant used during the initial assembly of the engine may be totally eliminated by the time you receive your replacement longblock. Therefore to prevent dry-start engine related damage it is crucial to prelube the engine before the initial start up. This short video illustrates a very simple way to perform this.