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Another OX66 250 lost rpms <<READ POST #106 FIRST>>

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Another OX66 250 lost rpms <<READ POST #106 FIRST>>

Old 06-30-2017, 08:23 AM
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Old 06-30-2017, 09:52 AM
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Old 06-30-2017, 10:43 AM
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Originally Posted by mesias View Post


Thanks for that info, I changed the pulser coil and it seems to run much better on the hose.
When fired up it idled high then after a minute or so it idled down as it normally did.

I'm doing a water test this afternoon
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Old 06-30-2017, 11:24 AM
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Originally Posted by Edselectric1 View Post
Thanks for that info, I changed the pulser coil and it seems to run much better on the hose.
When fired up it idled high then after a minute or so it idled down as it normally did.

I'm doing a water test this afternoon
Sounds good.
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Old 06-30-2017, 12:48 PM
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Originally Posted by Edselectric1 View Post
Thanks for that info, I changed the pulser coil and it seems to run much better on the hose.
When fired up it idled high then after a minute or so it idled down as it normally did.

I'm doing a water test this afternoon
That's a good sign... take the lamp with you and keep it plugged. It should start blinking a code 33 (3 blinks a pause and another 3) then a long pause then it repeats. If all is normal when it reaches about 113*F it should shift to a code 1. Keep in mind no oil transfer will ocurred while connected (Manual transfer will)
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Old 06-30-2017, 01:18 PM
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Default Success!!!

It was the pulser coil.

Ran the boat on the 5 gallon can until it ran out then I ran for another 30 minutes on the boat tank. Winky did just as described, 3 blinks for a minute or so then 1 blink.

Thanks to all of the guys who spend so much time trying to help people out with their problems. I really appreciate all of the input whether it be from experience or just an opinion .

Even though the the problem wasn't fuel related I sure did learn a lot about my fuel system and I also learned how to test just about every sensor on the motor.

If anyone is reading this and you are being told it is a fuel related issue, do yourself a favor and buy a Winky Blinky and use it first. You might just save 2 days of troubleshooting something that is working fine.

Thanks again Guys,

Ed

BTW, If anyone in Saint Pete area needs to borrow my Winky Blinky just ask!

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Old 06-30-2017, 01:20 PM
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Awesome! Glad you got it figured out!
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Old 06-30-2017, 01:25 PM
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Thanks for figuring it out and most importantly telling us what the problem was
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Old 06-30-2017, 01:33 PM
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Yay!!!! Glad to hear your motor can scream while burning some oil, again. The beast has awoken.
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Old 06-30-2017, 01:36 PM
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Nice work. I was on the fuel side for quite a while. This was definitely a lesson in ruling things out until finding the culprit.
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Old 06-30-2017, 01:42 PM
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This thread was like a mystery novel, the most important clue was right at the beginning, "I noticed the speedo was not working" Is it working now?
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Old 06-30-2017, 01:48 PM
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The low fuel rail pressure was an issue as well. You just never noticed it. There is nothing monitoring the fuel pressure in these motors so there is no sensor to trigger this symptom. As soon as the coil failed the idle RPM got higher enough for you to notice something was wrong.

I'm glad it all worked out... these are great, simple motors!
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Old 06-30-2017, 03:08 PM
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Originally Posted by nevets View Post
This thread was like a mystery novel, the most important clue was right at the beginning, "I noticed the speedo was not working" Is it working now?
It sure is!
No speedometer is one of the symptoms, learned that today too.
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Old 06-30-2017, 03:10 PM
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Originally Posted by Edselectric1 View Post
It sure is!
No speedometer is one of the symptoms, learned that today too.
Really? How the heck is that tied in to the pulsar coil?
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Old 06-30-2017, 03:15 PM
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Originally Posted by Knot on Call View Post
Nice work. I was on the fuel side for quite a while. This was definitely a lesson in ruling things out until finding the culprit.

I'm glad I didn't throw a bunof parts into it, instead I took the time and tested each individual part for proper operation. The Winky-Blinky was the tell all though.
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Old 06-30-2017, 03:21 PM
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Originally Posted by STIPulation View Post
Really? How the heck is that tied in to the pulsar coil?
I don't know why. I thought it worked off water pressure but the actual electric for the Guage has something to do with it. When I went to pick up the pulser coil and I was telling the guy what my symptoms were he asked me if the speedometer was working.
Has something to do with limp mode, i think

That's all I know.
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Old 06-30-2017, 03:36 PM
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I thought speedo worked off of water pressure too. Good to know the pulse coil can cause it along with low rom.
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Old 06-30-2017, 03:38 PM
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Originally Posted by lmannyr View Post
I thought speedo worked off of water pressure too. Good to know the pulse coil can cause it along with low rom.
It has something to do with the "limp mode". The computer must kill power to the speedometer gauge so the operator can see there is an issue.
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Old 06-30-2017, 04:18 PM
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Shew...lots of great information in this thread for sure. Note to self....Winky-Blinky is on the next purchase list. Sorry to the OP and thanks to the committed who helped us all...
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Old 06-30-2017, 07:28 PM
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Good deal on the fix, did you ever check spark in the beginning? ?
It's always good to pull each plug cap while running on hose to ensure each cylinder is operating, it can be a telltale for spark and fuel
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