Recent content by taka

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    Yamaha F250A 6P2 – Code 72 Above 4000 RPM After Warm-Up

    Hi everyone, Thank you again for all your advice. I have some new findings after running another sea trial with YDS connected to my Yamaha F250A (6P2). 1. New findings during the sea trial I ran the boat for approximately 30 minutes to allow the engine to warm up fully. Then I increased the...
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    Yamaha F250A 6P2 – Code 72 Above 4000 RPM After Warm-Up

    Thank you for your advice! I'll check and clean the connectors, including those at the ECU, and clear the fault codes before testing again. I'll let you know how it goes!
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    Yamaha F250A 6P2 – Code 72 Above 4000 RPM After Warm-Up

    Yes, that makes sense. I agree that comparing the data when the problem occurs with the data under normal conditions would be important. I'll see if I can find a safe way to collect the data and try it in the near future. Thank you for your advice!
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    Yamaha F250A 6P2 – Code 72 Above 4000 RPM After Warm-Up

    Thank you for your reply. Regarding the three checks shown in the YDS screenshot: 1. Check intake cam timing (PORT) with Engine Monitor I checked the intake cam timing using YDS at approximately 600 RPM (idle). Both PORT and STBD readings fluctuated slightly, but there was no significant...
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    Yamaha F250A 6P2 – Code 72 Above 4000 RPM After Warm-Up

    Hi everyone, Thank you for your advice so far. The Yamaha Diagnostic System (YDS) that I ordered has finally arrived, and I connected it to my engine to check the fault codes. The diagnostic history confirmed Code 72 – Cam position sensor (PORT INT). Here is what I have checked and done so...
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    Yamaha F250A 6P2 – Code 72 Above 4000 RPM After Warm-Up

    I have also attached a video showing the warning. The engine warning icon flashes in a very consistent pattern: 7 flashes, a pause, then 2 flashes, so I assumed that this indicated code 72. Just to confirm, does the number of flashes from the engine warning icon on this particular...
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    Yamaha F250A 6P2 – Code 72 Above 4000 RPM After Warm-Up

    Yes. According to the Yamaha service manual, code 72 is related to the PORT intake cam position sensor / signal. That is why I swapped the PORT and STBD cam position sensors, but the problem remained on the same side. I also swapped the PORT and STBD OCVs and OCV filters, with no change. My...
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    Yamaha F250A 6P2 – Code 72 Above 4000 RPM After Warm-Up

    Yes. It is the engine warning icon in the upper right of the tachometer shown in the photo. It flashes 7 times, pauses, then flashes 2 times. I have been assuming that this indicates code 72. Is that correct?
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    Yamaha F250A 6P2 – Code 72 Above 4000 RPM After Warm-Up

    Hello everyone, I have a Yamaha F250A (6P2) and I am trying to diagnose an intermittent engine warning. The problem occurs after the engine has warmed up and I run it above approximately 4,000 RPM. Most recently, I was cruising normally at about 4,200 RPM when the engine suddenly dropped to...
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