Fuel System; Fuel; Engine Oil; Installation Of The Fuel Tank - TOHATSU MFS 25D Service Manual

Rigging
r/ in

3. Fuel System

It is recommended to install an additional fuel/water separator on the boat to effectively remove water and foreign
substances contained in the fuel. If a fuel/water separator of a wrong size is added to the fuel system, this may restrict
the fuel and lead to the engine stalling or being damaged due to fuel starvation. Use of a valve fitting of a wrong size
may also cause similar problems.
Recommended Fuel/Water Separator Size:
Flow Rate: 50 L/H (13 GPH) or more
Filter Rating: 10 Micron

1) Fuel

Avoid using old gasoline or gasoline contaminated with debris, sand, mud, and other impurities during and after the
break-in operation of the engine.
Do not use a mixture of gasoline and oil as
fuel in this engine.

2) Engine Oil

1. Engine needs to be vertical position.
Remove the top cowl, then remove the oil filler cap 1.
2.
Supply engine oil from the oil filler hole 2.
3.
While supplying, check the level with the oil gauge 3.
Fill oil until the middle between a and b, reinstall filler
4.
cap and install the top cowl.
Recommended Engine Oil:
4st 4-Stroke Engine Oil
Recommended Engine Oil Grade:
API: SH, SJ, SL
SAE: 10W-30, 10W-40
Amount of Engine Oil:
(Including oil filter):
1,700 mL (1.8/1.5 US/Imp. qt.)
(Excluding oil filter):
1,500 mL (1.6/1.3 US/Imp. qt.)

3) Installation of the Fuel Tank

<Portable Fuel Tank>
Take into consideration the length of the fuel hose of the engine in selecting an appropriate position on the boat to
secure the tank.
<Stationary Fuel Tank>
Install the electrical ground, anti-siphon protection, ventilation etc. in accordance with standards.
10-6
WARNING
3 Oil level gauge a Upper limit (MAX) b Lower limit (MIN)
4st 25/30 2022