Specifications

Electronic Fuel Injected Engines
NOTE: The MasterCraft RTp-1, LQ9
and 8.1 Liter engines do not have
adjustable timing.
1. Start engine.
2. Attach an appropriate inductive
pickup timing light to the number one
cylinder spark plug wire.
3. Put engine into base timing
mode by running a jumper wire
from pin “A” to pin “B” on the
engine data link connector. The
idle should automatically adjust
to 900-1100 RPM.
NOTE: Due to variations in Diagnostic
Scan Tools, Indmar prefers using
this method of placing the ECM in
base timing mode.
3. Set the timing to 10 degrees BTDC
by loosening the distributor hold
down bolt and rotating the
distributor until the timing pointer
indicates 10 degrees BTDC.
4. Remove the jumper from the data link
connector. The idle RPM should
return to normal.
5. Shut the engine down and leave it
off for 15 seconds.
6. Repeat steps 1-4 to verify timing.
2005 MASTERCRAFT OWNERS MANUAL–PAGE 16-5