I was having issues with my 225 OX66 not reaching max rpm and if it did manage to make it over 5300 rpm, it would "roll back" and rpm would drop off. It ended up being an O2 sensor but during my troubleshooting I checked the TPS voltage. From what I could gather between forums and my SELOC manual, with the number 1 butterfly linkage disconnected, TPS voltage should have been around .50 Volts. With the linkage connected, it should be around .62 Volts. I am pretty much dead on in regards to these voltages give or take a couple of millivolts. My manual stated that at WOT I should have 5.0 Volts. I only have 3.9 Volts. Upon further research on several forums, I found a post that said the Voltage in the manual is incorrect for OX66's and should be "around" 4 Volts. Since I'm at 3.9 Volts, I would consider that "around" 4.0 Volts but I was wondering if anyone else has ran into this issue. I've only had the boat out once since I solved the O2 sensor issue and it seemed to run fine. I think my issue is solved but I'm not 100% sure. I briefly managed to get it to turn 5800-5900 rpm at approx 72 mph but it started violently chine walking and my down trim relay decided to go tango uniform at the same time, so I couldn't trim down to try and get out of the chine walk...so I got out of the throttle and went fishing. Thanks in advance for any info on the TPS voltage.
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