How To Service - Mercury Mariner / Tohatsu 30hp 2003 2 Stroke Outboard - MA30ML / M30A4

In this video, we take a detailed look at how to service a Mercury Mariner / Tohatsu 2003 2 stroke outboard engine.

Model number Mariner MA30ML 2003 & Tohatsu M30A4 2003.

Other Tohatsu engine years include 2002 ( A3 ) & 1996 ( A3 )

Both engines share many of the same parts, with both being built in Japan.

In this video, we change / check

Spark plugs
Fuel filter
Thermostat / gasket
Cylinder compression check
Drop lower unit
Change Impeller
Gear box pressure
Gear box oil
Prop
Test run

Hope you enjoy watching.

0:00 Introduction
0:02 MARINER 30HP MA30ML SERVICE
10:15 GASKET P/N 898101194
10:23 MARINER GASKETS HAVE THE SQUARE END TOO
12:21 EITHER PIN CAN BE REMOVED
17:40 13MM FOR LOWER UNIT BOLTS
23:52 LINER P/N 161572
24:10 GASKET P/N 161582
24:15 KEY P/N 161551
25:56 IMPELLER P/N 161541
28:38 QUICKSILVER 2-4-C
35:27 ZORO TOOLS IMPACT DRIVER
40:07 10 MINUTES AT 10 PSI IS A GOOD TEST LENGTH
44:19 19MM SOCKET