| SEAWATER/FUEL PUMP MAINTENANCE |
MCM/MIE 454 and 502 CID Engines New GM Generation V engines.
To help you identify the new GM Generation V engine, refer to Figure 1. The Gen V engine has the fuel pump mounted on the seawater pump. The previous big block engines had the fuel pump mounted to the cylinder block. Maintenance The lubrication change intervals has been changed. Fuel pump cam lube change intervals are not required. However, Check cam lube level: At each engine oil change. Lube level should be at bottom of threads for vent screw (c). Lubricant: Quicksilver High Performance Gear Lube, 92-816026A4. Although there isn't any mandatory lube change frequency, always, check for water entry into the lube, see if it smells like gas, and note any metallic appearance. These are the signs that service is required. Belt Tension Figure 2 (below) is for all L.H. rotation MCM and MIE engines. Please note that belt and pulley (a) are only used on MCM stern drive engines. 1. Belt should depress 1/4 in. (6mm) at (b) location. 2. To change belt tension, adjust idler pulley (c). DO NOT over-adjust idler pulley. Too much tension on belt will cause bearings in seawater pump to fail.
Note: belt routing for seawater/fuel pump is differant for MIE right hand engines. Refer to your service manual.
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