1993 Ocean-Pro 140 Repower

[jfret]

I bought a 1993 Sunbird with a 93 Ocean-Pro 140 as a donor boat for my 1974 AS 196 Rebuild. The motor was well maintained but unfortunately it has set for several years. I have decent mechanical skills, primarily with cars and trucks, and enough tools to be dangerous so I'm going to at least try to get it running myself....so I purchased a Evinrude shop manual and here I am.... Auto Zone was kind enough to loan me a compression tester and the results were well within 10% between highest and lowest at approximately 125 psi ....so i figured I'd drain down the carb bowls and clean out the gunk......
Instead of old fuel all 4 carbs were full of pure 2 stroke oil...still not sure what caused that,..after draining the oil and flushing with clean gas and fuel system carb-cleaner I disconnected and plugged the VRO, mixed fresh fuel and oil in a 5 gallon tank, connected and flushed the carbs out again. After all the spilled gas evaporated I hooked up the battery to see if it would fire......No spark on any cylinder. I did check the Emer Stop Switch circuit and it is not causing the problem. Considering the boat has sat for a while I will clean all electrical connections and connectors before I troubleshoot further. One interesting comment I did see was that the engine must crank at 300RPM to provide enough coil voltage to the power pack. This was not in the shop manual but on a Evinrude Forum. Since I usually overlook the simple obvious problems please weigh in with your suggestions.....thanks

[fitz73222]

And it will not fire at 299 rpm's either!! I have seen it and experienced it. Unplug the big red harness plug, take out the plugs, ground them and pull it over with a rope and see if the fire returns. I did a carb job on a '98 115 that had the same oil filled carbs when I tore it apart. If I recall, the small pony tank for the oil injection had a float and valve similar to carb that maintained the oil level in the tank and was leaking oil into the carbs over an extended period,especially if the engine was tilted up.

[Capt. Bob]

One interesting comment I did see was that the engine must crank at 300RPM to provide enough coil voltage to the power pack. This was not in the shop manual but on a Evinrude Forum. Since I usually overlook the simple obvious problems please weigh in with your suggestions.....thanks

Very true as Fitz stated.
Can't speak for the 93 manual but it clearly states this in my old 96 manual.

You need very clean battery connections, a fully charged battery and since additional power is supplied via the starter solenoid connection to the power pack, again be absolutely sure all electrical connections are clean and tight. The flywheel needs to rotate at 300 RPM or more in order to allow the stator to generate enough voltage to trigger the Power Pack to fire the plugs. Less will result in partial or no (as you are experiencing) spark at all. This is where you must start before you begin R & R of the electrical system. We have seen this several times before.

Good luck.

[jfret]

And it will not fire at 299 rpm's either!! I have seen it and experienced it. Unplug the big red harness plug, take out the plugs, ground them and pull it over with a rope and see if the fire returns. I did a carb job on a '98 115 that had the same oil filled carbs when I tore it apart. If I recall, the small pony tank for the oil injection had a float and valve similar to carb that maintained the oil level in the tank and was leaking oil into the carbs over an extended period,especially if the engine was tilted up.

That's good information to know......I need to look in the manual again and see how I missed that little detail. I'm not sure if I was turning at least 300rpm...I will definitely take your advice with the connectors and connections......and make sure I have a battery with enough power to her sing..

[Capt. Bob]

Here's some light reading to compliment your service manual.

http://www.ebasicpower.com/downloads/cditech/CDI-Troubleshooting_Guide-JOHNSON-EVINRUDE.pdf

[jfret]

Here's some light reading to compliment your service manual.

http://www.ebasicpower.com/downloads/cditech/CDI-Troubleshooting_Guide-JOHNSON-EVINRUDE.pdf

Thanks Capt Bob.......Nice find....it reads much better than a shop manual.