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2000 mercury sport jet timing discrepancy

Boardwaxstyle

Member
Messages
2
Reaction score
0
Points
10
Boat Make
Regal
Year
2000
Boat Model
Other
Boat Length
17
Hello all,
2000 Regal 1700 XR2 - mercury sport jet 175
Enginer serial 0E373820

I have the service manual and have followed it comprehensively and still find myself in a situation.

My timing is so far out that i cannot get it to spec even with the adjustments being maxed out.

The previous owner had swapped both control modules and had the carbs rebuilt prior to the issues below.

The engine developed a miss fire that evolved into hard starts or not starting at all. I checked compression, all cylinders are over 110. Spark plugs are in good shape. I did discover the middle cylinder on the port side bank is not firing. I swapped plugs and wires, still dead. I checked the stator and one of the coils were out of spec.

Red - ground : 107
Red/white - ground : 107
Red - blue: 3.74 k ohms
Red/white - blue/white: 12.5 - 13.4 m ohms

I replaced the stator with an OEM unit that was bench tested per the parameters in the manual and passed. I followed the manual for installation and it was installed in the exact same position as the one removed. Static timing with cylinder one brought to TDC then backed off .462 + 1/4 turn then returned to .462. The timing mark of the cover aligned with that. When i attempt to set timing for idle and WOT, the timing will not line up or come anywhere near spec. I made the mistake of following the manual and reseting all the bolts/adjusters for the throttle control arm and think that was the start of my headache but as said even with the trigger maxed out in rotational orientation the timing doesnt fall within soec for either idle or WOT. Im at a total loss and all help is appreciated.

Before i tear it all back apart can anyone verify if the trigger could have been flipped 180 from top to bottom and retain actuation and not hinder installation of the stator. That has been crossing my mind as the old stator was split and held onto everything. I did not adjust the linkage connecting the trigger to the throttle control arm. It remains locked in the position/distance it was already at.

- Rich
 
I would like to note that i am now getting spark to all cylinders but the one with a bad coil.
 
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