High Altitude Warning
Operation at High Altitude
The density of air at high altitude is lower than at sea level. Engine power is reduced as the air mass and air
fuel ratio decrease. Outboard motor output will be reduced. This is a natural trend and cannot be changed
by adjusting the engine. At sufficiently high altitudes increased exhaust emissions can also result due to the
increased enrichment of the air fuel ratio. Other high altitude issues can include hard starting, increased
fuel consumption and spark plug fouling.
To alleviate high altitude issues other than the natural power loss, dealer can provide a high altitude
carburetor main jet. The alternative main jet and installation instructions can be obtained by contacting
Customer Support.
The part number and recommended minimum altitude for the application of the high altitude carburetor
main jet are listed in the table below.
MODEL MAIN JET PART NUMBER ALTITUDE
F15A/F20A
Standard Main Jet P27X - 106
2000 Feet (609.6 Meters)
Altitude Main Jet P27X - 103
https://www.boat-manuals.com/
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