CNYBoater
Active Member
- Aug 14, 2017
- 386
- Boat Info
- 1994 200 Overnighter, Single Axle Easy Load'r Galvanized Trailer, 2006 Toyota Tacoma Double Cab
- Engines
- Single 1994 Mercury Black Max V135 O/B
Finally had some time to head to boat to look into my running issues, or best said, lack of running issues. Not warming up, idling rough, hard to keep it running. After last time out, pulled the new plugs and no soot and wet fuel mix on cylinder 1 and 3. This test was after I replaced plugs, wires and coils, as I've never changed wires or coils since I bought boat. chalking those parts up as maintenance items and not diagnostic. However, no change, so I let her sit since there was an advisory on my lake, and I had other things to prioritize.
Did a cold compression test, since I cannot get her running well enough to heat up. In retrospect, I should have shot some oil in there prior to. Spec is listed as 110 - 135 psi, given the conditions of "Using a fully charged battery, throttle shutters wide open and cylinder block warm". I am going to assume that my low numbers are due to the lack of the final requirement... From 1 through 6 I have the following; 79, 78, 79, 80, 81, 79. So my values are very low, but consistent. I'll check again under the correct conditions once she is running correctly..
second task was to move up the spark chain. Checked resistances on stator, trigger and power packs. I grant that I could be doing this wrong, I'm not an electrician or mechanic, but both power packs, and the stator had at least one lead that ohm'd out. The stator wire that had high resistance went to my top voltage regulator, which I had recently replaced since I had no tach on it, but I did on the lower during swap. The high resistance at the power packs was a lead from trigger, so I don't know if it was trigger or power packs. Per the test procedure in my manual, it states the procedure and values to check for at various RPMs while running, but that's not going to be possible at the moment. I pulled off the plate hiding my two voltage regulators, no physical impairments seen. Pulled the flywheel and stator has 5 coils showing clean copper, 5 coils in a burnt umber color. That has me a little suspicious... pulled the stator out to inspect the trigger and no visible physical impairments there. Looking at the power packs/switch boxes, I do not see anything visibly melted, burnt etc. Now that I have access to everything, I see that my stator is a mercury component, but not the original part number, A24 instead of A19. Trigger looks to be a CDI, and both power packs are an unknown make as they don't look like the Mercury or the CDI switch boxes. They sort of look like the sierra, but no part number or make stamp.
I am now out of options, with no available "vintage" 2-stroke outboard mechanics in there area anymore. Would definitely be "Throwing parts at the problem" for me to replace stator, trigger, power packs and another voltage regulator. I don't have the budget at the moment for that, so my season is effectively over, with only 8 running hours this year.
Did a cold compression test, since I cannot get her running well enough to heat up. In retrospect, I should have shot some oil in there prior to. Spec is listed as 110 - 135 psi, given the conditions of "Using a fully charged battery, throttle shutters wide open and cylinder block warm". I am going to assume that my low numbers are due to the lack of the final requirement... From 1 through 6 I have the following; 79, 78, 79, 80, 81, 79. So my values are very low, but consistent. I'll check again under the correct conditions once she is running correctly..
second task was to move up the spark chain. Checked resistances on stator, trigger and power packs. I grant that I could be doing this wrong, I'm not an electrician or mechanic, but both power packs, and the stator had at least one lead that ohm'd out. The stator wire that had high resistance went to my top voltage regulator, which I had recently replaced since I had no tach on it, but I did on the lower during swap. The high resistance at the power packs was a lead from trigger, so I don't know if it was trigger or power packs. Per the test procedure in my manual, it states the procedure and values to check for at various RPMs while running, but that's not going to be possible at the moment. I pulled off the plate hiding my two voltage regulators, no physical impairments seen. Pulled the flywheel and stator has 5 coils showing clean copper, 5 coils in a burnt umber color. That has me a little suspicious... pulled the stator out to inspect the trigger and no visible physical impairments there. Looking at the power packs/switch boxes, I do not see anything visibly melted, burnt etc. Now that I have access to everything, I see that my stator is a mercury component, but not the original part number, A24 instead of A19. Trigger looks to be a CDI, and both power packs are an unknown make as they don't look like the Mercury or the CDI switch boxes. They sort of look like the sierra, but no part number or make stamp.
I am now out of options, with no available "vintage" 2-stroke outboard mechanics in there area anymore. Would definitely be "Throwing parts at the problem" for me to replace stator, trigger, power packs and another voltage regulator. I don't have the budget at the moment for that, so my season is effectively over, with only 8 running hours this year.
