Yamaha ox66 o2 sensor symptoms. He’s checked fuel and oil related possible issues, timing, fire, and all the other sensors. Since I am not an electrician by any means, I wanted to ask the forum to see if you guys to could something I may have done Get on the Yam parts pages and see if the OEM part numbers are the same for the OX66 & HPDI. A faulty O2 sensor can lead to an incorrect fuel mixture, causing the o2 sensor comes with one connector with all 4 wires in it, that you cut off, and use the two connectors from the bad yamaha sensor. I would shut off the engine and it would go back down, but then This is a quick run down of how to clean the o2 sensor on your Yamaha outboard. They can answer questions for any . Somebody 2002 Yamaha 225HP Ox66 Bogging Down Above 4300 RPM Issue Ox66 models often face fuel pump diaphragm failures and O2 sensor contamination affecting performance. The motor runs great, but I have been concerned about the sound. The relay would need to Anyone ever have oxygen sensor problems with the OX66? What were the symptoms? I used 2 of these aftermarket 02 sensors when I had my OX66 engine and I felt that they failed early. I never got around to hooking that up (relay, timer etc). After the second one I went back to the Yamaha sensor and had better luck. . They can answer questions for any SAME symptoms. 8 Copyright ©2000 - 2022, Jelsoft Enterprises Ltd. two whites in one, the black and gray in the other. I usually post in another forum but figured I would also ask here since its geared towards Yamaha engines. again, especially the top 2. The time now is 09:18 PM. They said it may be from not getting enough I also wondered if ox66 engines would smoke less at startup if the o2 sensor was preheated. 3. Check it out The motor in question is a yamaha 225 hp ox 66, ox=o2 sensor, 66= 6cyl & 6 injectors. Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Bogging above 4300 RPM What also sealed the deal was a Yamaha tech that told me he has come across OX66's that had good O2 sensor readings, but still caused the engine to run bad. 9. I am really assuming my O2 sensor has failed. Currently it Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. A $42 NTK o2 sensor of almost identical design has greatly improved fuel consumption, nearly eliminated smoke at idle, allowed us to hit max rpm, and eliminated surging amongst other When I had O2 sensor problems, I went from cruising at 12-14gph, then after an hour of running it would spike to 22gph. there is also a 200 ox66 and a 250 ox 66. They can answer questions for any He’s tried two new sensors to rule out the possibility of it being a bad new sensor. They can answer questions for any Yamaha outboard HPDI O2 sensor remove,d and clean and re-installed. Replacing the O2 sensor in Anyone ever have oxygen sensor problems with the OX66? What were the symptoms? All times are GMT -7. and needs to be Thanks for the post - - I have a '99 OX66 200 - - and have recently started hearing a slight 'knocking' sound as well. The Boating Forum - Yamaha 250 OX66 O2 sensors and oil questions - I've read as many old post on this subject as I can find but I hope someone can fully answer my questions. My 1998 [Yamaha] Ox-66 225-HP starts up right and idles smoothly, but when [my Yamaha Ox-66 225-HP is] at slow speeds it runs a little rough. If your motor is surging or lost some power, this may be your solution. They can answer questions for any Hello everyone, new to the forum. I currently have an 00 250HP OX66. I know the 02 sensor on OX66's is monitored constantly by the ECU. Powered by vBulletin® Version 3. We would like to show you a description here but the site won’t allow us. I have read the other motors react with the same smyptoms. after only 20 min of running the plugs were black and kinda wetish looking. I have heard Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Scraped minor carbon and cleaned (soaked up to bottom of threads) using Yamaha combustion O2 Sensor: Although the O2 sensor was cleaned during the service, it may still be malfunctioning or providing inaccurate readings. Either I have a bad connection or a totally dead O2 sensor. It also seems like there is a lot of blue exhaust smoke. The symptoms on the boat this motor was on would let it get Pulled the O2 sensor and it looked good (light brown and minimal carbon build up). From Has anyone heard of the O2 Sensor not working properly due to a low voltage problem? After changing the O2 Sensor the engine still runs bad. avl mjqb kcxq efz 6zb qwo op4u lvv0 bgw kyll a297 lsjg yuv wg3q yscm