Mercury V8 300 User Manual

Important Information
Section 1B - System Theory
Table of Contents
Overview............................................................................ 1B-2
Speed/Density Theory....................................................... 1B-2
Stoichiometry, Equivalency Ratio, and Emissions Control
....................................................................................... 1B-2
Oxygen (O2) Sensor.......................................................... 1B-3
Open‑Loop and Closed‑Loop Operation............................1B-3
Advanced Range Optimization.......................................... 1B-4
Propulsion Control Module (PCM)..................................... 1B-4
Description..................................................................1B-4
Engine Guardian System................................................... 1B-5
Important Terms.................................................................1B-5
System Theory
90-8M0146617 eng JULY 2018 © 2018 Mercury Marine Page 1B-1
1
B

Mercury V8 300 Specifications

General

Horsepower	300 HP
Displacement	4.6 L
Full Throttle RPM Range	5200-6000 RPM
Fuel Induction System	Electronic Fuel Injection (EFI)
Gear Ratio	1.75:1
Starting	Electric
Shaft Length	20 in, 25 in, 30 in
Warranty	3-Year Limited Warranty
Engine Type	V8
Fuel Type	87 Octane
Bore x Stroke	92 mm x 86 mm