There are various changes that were made on the 4.3L engine throughout the years. Listed below is a link that will assist you in choosing the correct longblock for you application.
Technical Tips
This new replacement engine is available for the direct replacement of older OMC Stringer, Cobra, MerCruiser and Volvo 1986 - 1992. This motor is a non-Vortec, Non-balance shaft design, but comes with a roller cam shaft , fuel pump pad and a 1 piece rear main seal. No- Intake, Flywheel, Balancer or Water Pump.
For more details about product installation, and how to determine whether you have a standard or opposite rotation engine, select the following link for details. Engine Installation Information....
Includes a 12 month limited warranty.
Engines include oil pan, timing chain cover, valve covers and intake manifold.
Upon completing any engine order on the website you will be sent a Purchase Sales Agreement which must be completed and returned before the engine will be shipped. This document contains important warranty information and protects both the seller and buyer for the purposes of the sale.
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