BRP E250DHLSCS Service Manual page 385

OUTBOARD STARTS, LOW MAXIMUM RPM
OBSERVATION
SystemCheck light
Setup or rigging
change
Performance of
outboard at lower
speeds appears
normal
EXCESSIVE SMOKING
OBSERVATION
May coincide with
increased oil
consumption
(normal if occurs after
winterization)
POSSIBLE CAUSE
Outboard is in S.A.F.E.
Incorrect propeller
Incorrect outboard mounting
height
Throttle plate opening
Incorrect, fouled, or worn spark
plugs
Contaminated or poor quality
fuel
Fuel supply restricted
Low alternator output (55 V)
Weak or erratic ignition
operation
Fuel injector electrical circuit or
control function
Restricted or leaking fuel
injectors
Low fuel pressure
EMM programming, timing, or
operation
Restricted engine exhaust
POSSIBLE CAUSE
Contaminated or poor fuel
Excessive fuel or oil
consumption
Outboard in break-in mode
Outboard mounted too low
Vapor separator vent
Faulty/leaking fuel injector(s)
Damaged fuel lift pump
TROUBLE CHECK CHART
OUTBOARD STARTS, LOW MAXIMUM RPM
PROCEDURE
Access EMM service codes and check System-
Check warning
Refer to specifications, check recommended WOT
RPM; water test and install correct pitch propeller
Refer to installation guidelines
Check throttle plate and WOT opening
Replace spark plugs
Check or replace fuel supply
Check primer bulb, anti-siphon valve, and fuel
pick-up, check for fuel system air leaks
Check voltage on 55 V circuits, refer to SYSTEM
ANALYSIS and ELECTRICAL AND IGNITION
Check ignition, refer to SYSTEM ANALYSIS and
ELECTRICAL AND IGNITION
Check voltage at injectors, refer to SYSTEM
ANALYSIS
Check injectors, refer to FUEL SYSTEM
Check circulation pump operation, refer to FUEL
SYSTEM
Check EMM program and timing; check injector
coefficients; and monitor injector circuits and
ignition primary outputs
Check and repair as needed
PROCEDURE
Check or replace fuel supply
Check fuel system for fuel supply air leaks or
leaking fuel injectors
Use diagnostic program to confirm
Check installation height of outboard
Check vapor separator assembly for proper
venting/float valve operation
Check injectors, refer to FUEL SYSTEM
Check for internal leaks
T–5