2003 ST 4 Stroke 9.9/15HP Johnson outboards Service Manual, Page 197Get this manual
Outboard Fuel, Electrical System, and Safety
The fuel system starts here at the fuel tank .and ends here at the fuel injector
The electrical system begins here at the battery
.and ends here on the powerhead
What is most important?
Fuel leakage must be eliminated Stray electric sparks must be avoided
What could happen?
When not boatingfuel leaking in car trunk or vanor place where portable tank is stored (basement or cottage)could be ignited by any open flame or spark (furnace pilot light, etc When boating, fuel leaking under the motor cover could be ignited by damaged or deteriorated electrical part or loose wire connection making stray sparks
How Can Fire and Explosion Be Minimized?
Readunderstand, and follow manufacturer's instructions Follow warnings marked ",&closely Do not substitute fuel or electrical systems parts with other parts which may look the sameSome electrical parts, like starter motors, are of special design to prevent stray sparks outside their cases Replace wires, sleeves, and boots which are cracked or torn or look in poor conditionWhen mixing and refueling, always mix gas and oil outside Always fill the tank outside the boat