400 / 800 and stinger major mechanical lower unit technical outdrive troubleshooting points to inexperienced
mechanical techniques isolating fuel and carburetor problems
Bottom line is idle speed in relationship to engine
rpm is 20 to 50 percent over manufactures specifications
Carburetor adjustments are critical to clutch dog, forward
gear and reverse gear relationship
Owners manual recommends 650 rpm. Most boats we get for repair are idling at 800
to 1000 rpm
Boating enthusiasts with limited mechanical skills should have carburator rebuilt buy local carburator
repair shop listed in the yellow pages
NOTE Idle speed should not be adjusted to make up for poor balancing in carb
flow between left and right side of carb
If your engine will not idle at 650 to 700 rpm #1 item to look at to isolate
problems is carb balance
Water separating fuel filter should be changed once a year or one added to the stern drive
motor
External return spring should be added to carburator to make up for play in linkage. This $2.00 spring could
save you $2,000.00 later in repairs. See illustration
Check shifter box located on rear of engine for forward and
neutral shifter return consistency in the water for broken or worn plastic pieces in the omc stern drive shifter control box
24950 water separator kit
# 24950 $32.29
Water separating fuel filter help keep carburetor clean isolate water in tank and metal particles to
filter area.
Carburetor Spring
External return spring should be added to carburator to make up for play in linkage. This $2.00 spring could save you
$2,000.00 later in repairs. See illustration
T.C. Electronics/Marine (416) 751-7326 Copyright 2002 to 2024 all rights reserved
