Mercury MerCruiser GM V-8 Engine 305 CID (5.0L) & 350 CID (5.7L) Service Manual #24

Mercury MerCruiser GM V-8 305/350 CID Service Manual Documentation

• Covers 1999 Mercury MerCruiser 305 CID (5.0L) and 350 CID (5.7L) GM V-8 marine engines, including Alpha and Bravo sterndrive and MIE inboard configurations
• Official Mercury Marine publication 90-861327--1, dated October 1999
• Contains 895 pages of technical content including wiring diagrams, torque tables, exploded views, and diagnostic flow charts for fuel and electrical systems
• File link appears in your order confirmation straight away
• Stored against your account so you can retrieve it after a hard-drive loss
• Full-text search finds any part number in seconds
• Laid out for standard letter and A4 printing
• This 1999 edition is the definitive source for the service of the GM V-8 marine engine series featuring the Thunderbolt V ignition and multi-port fuel injection control systems

Engine Service and Diagnostic Coverage

This publication provides detailed technical parameters for the maintenance and overhaul of the 305 CID and 350 CID marine engine series. The content covers engine identification, rotational specifications, and detailed lubrication protocols for internal components like crankshafts, piston assemblies, and valve trains. It documents diagnostic procedures for carbureted and fuel-injected systems, listing sensor reference values and trouble code charts for MEFI 1, MEFI 2, and MEFI 3 control modules. Experts will find the wiring diagrams for the starting, charging, and fuel ignition harnesses instrumental for electrical system diagnostics.

Cooling, Drive, and Transmission Specifications

This manual also details the maintenance requirements for both seawater and closed-loop cooling systems, including draining procedures for winterization and seawater pump service. The drivetrain section includes service data for Velvet Drive and Hurth transmissions, shift cable adjustments, and coupler lubrication instructions. Reference values for ignition timing, oil pressure thresholds, and fluid capacities are provided to facilitate what an OEM service publication covers for these engines. Cylinder head bolt torque is specified at 30 lb-ft for thermostat covers, while distributor hold-down torque is listed at 18 lb-ft in the ignition section. The 5.7L MCM compression is documented at a minimum of 100 psi. An official 895-page Mercury Marine OEM service manual covering the 305 CID and 350 CID GM V-8 marine engines, documenting engine, cooling, fuel, electrical, and transmission specifications for the 1999 build year range.