jarlethaanthonyt
26.05.2021 17:13:31
4. Start engine, allow rpm to stabilize. here
See full version: Mercruiser special ignition timing required 10
4. Start engine, allow rpm to stabilize. here
3. Stop engine and connect the scan tool or timing tool to the DLC connector on the EFI/ MPI wiring harness. here
1. Connect timing light to number 1 spark plug wire. more
Service Manual #24, which also covers the 5.0L MPI/EFI engine but is older (circa 1999), has the procedure copied below.
6. Recheck ignition timing. [links]
NOTE: If NOT Using MerCruiser Timing Tool: With engine running, set the scan tool or Marine Diagnostic Code Tool to the SERVICE MODE and follow manufacturer’s instructions. On 350 Mag MPI Model, engine RPM will automatically increase to a higher RPM. You do not have to increase it manually, as stated in the following steps.
B Temporarily join the engine harness wires together.
1. Connect timing light (91-99379 or similar) to No. 1 spark plug wire. Connect power supply leads, if applicable, on light to 12 volt battery. Refer to Specifications – “Engine Rotation and Firing Order” for cylinder numbering and location.
2. Connect a shop tachometer to engine.
3. Using a jumper wire, connect the ignition system timing lead (PUR/WHT wire) to a good engine ground (-). This locks the ignition module into the “Base Timing Mode”. here
NOTE: Before starting engine make sure the timing tab and marks on damper are clean. Chalk or white paint on timing marks may help visibility. [links]
IMPORTANT: Failure to follow these timing procedure instructions will result in improper timing causing performance problems and possible severe damage to marine engines.
7. Adjust timing by loosening distributor clamp and rotating distributor body as required until timing mark on damper or pulley lines up with the mark on tab specified in “Specifications.” Tighten clamp and recheck location of timing mark. more
10. Reconnect the two wires to the shift interrupt switch.
NOTE: Before starting engine make sure the timing tab and mark on damper are clean. Chalk or white paint on timing mark on damper may help visibility.
6. Aim timing light at timing tab, located on the timing gear cover and crankshaft torsional damper. Check the timing. Refer to ?Specifications?. here
7. Adjust timing by loosening distributor clamp and rotating distributor body as required until timing mark on damper or pulley lines up with the mark on tab specified in ?Specifications.? Tighten clamp and recheck location of timing mark. [links]
I am trying to set the base timing on my Mercruiser 3.0L. Following the instructions below I am having trouble with step 4B. I don't quite understand what they mean here. It looks like the same color wire comes out of the distributor and goes to the shift interrupt switch. I can disconnect that, but what do I join it to?
A Disconnect wires at shift interrupt switch. more
Re: 1996 Mercruiser 4.3LX "base timing" question! Is my marina technician wrong or w
and a Thunderbolt IV module will not fit the thunderbolt V connector. Show us a clear picture, and we can make it 100% certain. Hate to see you loose any more sleep over this.
Your engine serial number (0F821387) uses ignition control module PN 807829T1 that is for a TB5 ignition system, the parts program doesn't even list the TB4 as an option.
So, if you have a TB4, then somebody changed it and modified the wiring harness for the TB4, because there is no purple white wire on a TB4 ignition system. That purple/white wire comes out of the ignition module. [links]
Re: 1996 Mercruiser 4.3LX "base timing" question! Is my marina technician wrong or w