How does a distributor advance timing?
How does a distributor advance timing?
As the distributor spins faster and faster with engine RPM, centrifugal forces fling out weights inside the distributor housing, moving a cam mechanism and advancing the timing.
How do you change ignition timing on a vacuum advance distributor?
Unplug the electrical connector and, if your model has it, the vacuum advance hose from the distributor. Plug the hose with a small screw and don’t remove the plug until you have adjusted ignition timing. Detach the distributor cap. On some models you can detach the cap without disconnecting the spark plug wires.
Why do I need to change the distributor timing?
It’s important that the engine be idling at its warm-idle rpm. It’s likely that our static ignition timing at the crankshaft at idle may not be the desired 10 degrees BTDC. If it must be changed, merely loosen the hold-down nut and adjust the distributor until the initial timing on the crankshaft is at the desired timing figure.
What’s the best advance timing for a 009 distributor?
Try 30 degrees at 3000 rpm first, and let the idle timing fall where it may. If the maximum advance timing is set at less than 28 degrees, it will be under-advanced at high rpm and result in overheating.
How can I tell the direction of a vacuum advance distributor?
Tech Tip: One quick way to tell on any vacuum advance style distributor is to lay your hand parallel with the vacuum advance canister and then curl your fingers inward toward the middle of the distributor body. The direction your fingers point is the direction of rotor movement.
Unplug the electrical connector and, if your model has it, the vacuum advance hose from the distributor. Plug the hose with a small screw and don’t remove the plug until you have adjusted ignition timing. Detach the distributor cap. On some models you can detach the cap without disconnecting the spark plug wires.
How to adjust the timing on a MerCruiser engine?
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. 8. Aim timing light at timing tab and recheck location of timing mark. Repeat Step 7 until timing is correct. 9.
Do you need to rotate distributor when setting ignition time?
Double check that the aligning marks on the engine, distributor, and primary rotor mark, are all aligned. This will indicate you have installed the distributor correctly. Install the distributor hold down bolt finger tight and slightly loose. You may need to rotate the distributor by hand when setting the ignition time.
How do you know which way the distributor is pointing?
Place a mark on the distributor so that you know which way the rotor is pointing. You’ll use this mark when reinstalling the distributor. But don’t remove the rotor from the distributor until you have removed the distributor off the engine. Make a note of the position of the vacuum advance, if your distributor has one.
