Dos caminos de diseño institucional

587 and 717 Engines

Remove battery (except HX).

Remove magneto housing cover and grounding device.

For removaI of magneto, refer to ELECTRICAL SYSTEM 08-01.

Timing is performed by moving armature plate ; clockwise to retard spark occurrence or counter-clockwise to advance.

TYPICAL 1. To retard 2. To advance

To adjust, loosen 3 armature plate retaining screws and slightly rotate armature plate in prop-er direction.

NOTE : As a guideline, turn the armature plate the same amount needed to align mark on PTO flywheel.

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08-02-7 TYPICAL

1. Retaining screw

Example 1

When PTO flywheel mark is on right side of timing tool slot, it indicates advanced timing.

1. Too advanced timing

In this case, turn armature plate clockwise when facing it.

Example 2

When PTO flywheel mark is on left side of timing tool slot, it indicates retarded timing.

1. Retarded timing

In this case, turn armature plate counterclockwise when facing it.

After adjustment, tighten armature plate retaining screws.

CAUTION : Armature plate screws must have Loctite 242 (blue) applied before tightening. Make sure armature plate screws are well secured.

Reinstall removed parts. Refer to ELECTRICAL SYSTEM 08-01.

Recheck ignition timing (make sure engine is cold).

Repeat armature plate positioning procedure if timing mark position is not adequate.

787 Engine

Since the trigger coil on this engine is fixed and not movable to correct the ignition timing, the MPEM programmer (P / N 295 000 127) is now used to set the timing when an adjustment is re-quired. The programmer will act as if you were moving the trigger coil to advance or retard the ignition timing.

NOTE : For more information on the pro-grammer, refer to its guide.

Through the MPEM programmer, the ignition tim-ing can be advanced up to 3° or retarded up to 4°.

If the timing is adjusted too retarded, a perfor-mance decrease of the engine will be noticed. If the timing is adjusted too advanced, serious en-gine damage will occur.

CAUTION : If the ignition timing is adjust-ed too advancadjust-ed, this will cause serious damage to the engine.

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-08-02-8

The timing mark refer to the physical component position when the spark must occur. The DC-CDI module must be synchronized with the mark. For instance, on a particular engine, the timing correc-tion may need to be advanced to 2° so that the mark aligns with timing mark pointer tool. This is not the real spark advance, just a correction for the tolerances of the mechanical components.

Knowing that, you select with the programmer the higher or lower number to advance or retard the actual timing correction by referring to the fol-lowing chart.

Examples :

a. You found the flywheel mark advanced. You must retard the ignition timing.

– The programmer gives you the number 3.

Referring to the chart, number 3 returns a correction of 2° (advanced) and this is too much in this case.

– You estimate the correction should be set to 1° (advanced) to align flywheel mark. Back in the chart, look to find 1° (advanced). This gives number 4. Enter this number with the programmer.

– You recheck the timing with the timing light and if the mark is aligned, ignition timing is properly set.

b. You found the flywheel mark advanced. You must retard the ignition timing.

— The programmer gives you the number 3. Refer-ring to the chart, number 3 returns a correction of 2° (advanced) and this is too much in this case.

– You estimate the correction should be set to 1° (advanced) to align flywheel mark. Back in the chart, look to find 1° (advanced). This gives number 4. Enter this number with the programmer.

– You recheck the timing with the timing light and found that the flywheel mark is still too advanced. You know now that the correction made previously was not enough and you es-timate the correction should be set to - 2° (re-tarded) to align flywheel mark. Back in the chart, look to find - 2° (retarded). This gives number 6. Enter this number with the pro-grammer.

– You recheck the timing with the timing light and if the mark is aligned, ignition timing is properly set.

c. You found the flywheel mark retarded. You must advance the ignition timing.

– The programmer gives you the number 4.

Referring to the chart, number 4 returns a correction of 1° (advanced) and this is not enough in this case.

– You estimate the correction should be set to 2° (advanced) to align flywheel mark. Back in the chart, look to find 2° (advanced). This gives number 3. Enter this number with the programmer.

– You recheck the timing with the timing light and if the mark is aligned, the ignition timing is properly set.

Proceed as follows to adjust the ignition timing with the MPEM programmer :

1. Connect the communication cable to the MPEM programmer and the other end to the safety lanyard switch on the craft.

2. Press the ON / C button on programmer and enter your password.

3. Press 3 to choose Vehicle info in programmer.

4. Press 4 to choose Engine param.

5. Press 2 to choose Timing adjust.

6. The programmer display a number that is actu-ally stored in the MPEM.

7. Press -- to choose yes for modify then press Enter.

8. Now punch in the number that corresponds to the degree you want for the ignition timing then press Enter.

9. Press Menu to go back one level.

TIMING CORRECTION CHART Programmer number

08-02-9

10. Press 8 to choose Save + Quit (even if item no. 8 is not visible on the display, it is active when you select it).

11. Press Enter to confirm yes you want to save modifications to the MPEM.

12. You must see Operation successful. This confirms that the new timing has been stored in the MPEM.

13. Unplug communication cable from safety lan-yard switch on craft.

14. .Press Off to close the programmer.

At this point, you can install the watercraft safety lanyard and start the engine to check the effect of the correction on the ignition timing. If further ad-justment is required, repeat the procedure.

NOTE : The MPEM module features a per-manent (non-volatile) memory and keeps the ignition timing programmed even when the watercraft battery is disconnected.