MerCruiser 350 MAG MPI Horizon Owner's Manual

Page ii 90-864197070 JUNE 2007
Starting and Stopping the Engine................. 41
Starting the Engine..................................... 41
Stopping the Engine....................................42
Throttle Only Operation.................................42
Freezing Temperature Operation..................43
Drain Plug and Bilge Pump...........................43
Protecting People In The Water........................... 43
While You Are Cruising....................................43
While Boat Is Stationary.................................. 44
High‑Speed And High‑Performance Boat
Operation..............................................................44
Passenger Safety In Pontoon Boats And Deck
Boats.................................................................... 44
Boats Having An Open Front Deck..................44
Boats With Front‑Mounted, Raised Pedestal
Fishing Seats...................................................44
Wave And Wake Jumping....................................45
Impact With Underwater Hazards........................ 45
Conditions Affecting Operation.............................46
Weight Distribution (Passengers and Gear)
Inside the Boat.............................................. 46
Bottom Of Boat..............................................46
Cavitation...................................................... 47
Ventilation..................................................... 47
Elevation And Climate...................................47
Getting Started..................................................... 47
20‑Hour Break‑In Period............................... 47
After Break‑In Period.....................................48
End of First Season Checkup....................... 48
Section 4 - Specifications
Cruising RPM....................................................... 50
Fuel Requirements...............................................50
Fuel Ratings.....................................................50
Using Reformulated (Oxygenated) Gasolines
(USA Only).......................................................50
Gasolines Containing Alcohol..........................50
Engine Oil.............................................................51
Engine Specifications...........................................52
Tow Sports Models..........................................52
Inboard Models................................................53
Fluid Specifications.............................................. 53
Engine..............................................................53
Transmission................................................... 54
Section 5 - Maintenance
Owner/Operator Responsibilities..........................56
Dealer Responsibilities.........................................56
Maintenance.........................................................56
Do It Yourself Maintenance Suggestions............. 57
Inspection.............................................................57
Maintenance Schedule ‑ Inboard Models.............58
Routine Maintenance.......................................58
Each Day Start............................................58
Each Day End.............................................58
Weekly........................................................ 58
Every Two Months or 50 Hours.................. 58
Scheduled Maintenance..................................58
After the Initial 20 Hour Break‑In Period..... 58
Every 100 Hours or Annually (Whichever
Occurs First)............................................... 58
Every 300 Hours or 3 Years........................58
Maintenance Log..................................................59
Engine Oil.............................................................59
Checking..........................................................59
Filling............................................................... 60
Changing Oil and Filter....................................61
Easy Engine Oil Drain System....................61
Engine Oil Drain Pump............................... 61
Changing Filter............................................62
Transmission Fluid............................................... 63
Checking While the Engine is Warm............... 63
Checking While Engine is Cold........................63
Changing......................................................... 63
Engine Coolant.....................................................63
Checking..........................................................63
Filling............................................................... 64
Changing ........................................................ 65
Cleaning The Flame Arrestor............................... 65
Positive Crankcase Ventilation Valve (PCV)... 66
Changing.....................................................66
Changing Water Separating Fuel Filter................67
GEN II Models................................................. 67
GEN III Models................................................ 68
In‑line Fuel Filter...................................................70
Lubrication............................................................72
Throttle Cable................................................72
Transmission Linkage................................... 72

MerCruiser 350 MAG MPI Horizon Specifications

General

Brand	MerCruiser
Model	350 MAG MPI Horizon
Category	Engine
Language	English