THEWHORULZ
Cadet
- Joined
- Sep 5, 2010
- Messages
- 24
I have a 1995 3.0LX mercruiser I need to set the timing on. Ive looked all over and asked people how to get the motor in base timing and Ive gotten a bunch of different answers. I have followed the instructions in the manual which say:::: 1. Start engine and allow it to reach proper operating temperature.
2. With engine running, install a jumper wire across the two WHITE leads
on the distributor using (91-818812a1), or fabricate one using a 6 in. (150
mm).
section of 16 GA wire using two male bullet terminal ends connected.
3. Bypass the shift interrupter switch by disconnecting wires at the shift
interrupt switch.
Temporarily join the engine harness wires together ( the wires you unplugged
from the switch).
IMPORTANT: Do not fail to reconnect these two wires to the shift interrupt
switch when timing
procedures are complete.
4. With timing light connected, check timing. Timing should be 1 degree
BTDC.
5. If required, loosen distributor hold down clamp and rotate distributor to
obtain specified timing.
6. Secure distributor hold down clamp, and recheck timing as above.
7. Reconnect the two wires to the shift interrupt switch. Remove jumper wire
at distributor white leads.
IMPORTANT: Be sure to remove jumper wire before returning engine to service,
otherwise timing will
not advance.
8. With timing light still connected and engine running at IDLE, verify that
timing did advance to 12 deg
BTDC (plus or minus 2 degrees).
At 2400-2800 RPM maximum advance is obtained and should be 27 degrees BTDC
(plus or minus 2 deg).
I understand everything on here except step #3. Its confusing. What does step 3 mean? Is this procedure right? Is there an easier way to get to base timing? Thanks for any help.
2. With engine running, install a jumper wire across the two WHITE leads
on the distributor using (91-818812a1), or fabricate one using a 6 in. (150
mm).
section of 16 GA wire using two male bullet terminal ends connected.
3. Bypass the shift interrupter switch by disconnecting wires at the shift
interrupt switch.
Temporarily join the engine harness wires together ( the wires you unplugged
from the switch).
IMPORTANT: Do not fail to reconnect these two wires to the shift interrupt
switch when timing
procedures are complete.
4. With timing light connected, check timing. Timing should be 1 degree
BTDC.
5. If required, loosen distributor hold down clamp and rotate distributor to
obtain specified timing.
6. Secure distributor hold down clamp, and recheck timing as above.
7. Reconnect the two wires to the shift interrupt switch. Remove jumper wire
at distributor white leads.
IMPORTANT: Be sure to remove jumper wire before returning engine to service,
otherwise timing will
not advance.
8. With timing light still connected and engine running at IDLE, verify that
timing did advance to 12 deg
BTDC (plus or minus 2 degrees).
At 2400-2800 RPM maximum advance is obtained and should be 27 degrees BTDC
(plus or minus 2 deg).
I understand everything on here except step #3. Its confusing. What does step 3 mean? Is this procedure right? Is there an easier way to get to base timing? Thanks for any help.