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Cleaned my OX66 250 O2 sensor. The Tube was SOLID Carbon, took me over 30 minutes to get it out with varying drill bits! Black oil like substance in everything. Having owned the engine for the second year, I am doubting anyone ever cleaned it?
QUESTION - I ran Testing per the Standard O2 PDF...
I have a 99 S250TXRX that is running well (5600 WOT) but seems to smoke and run rough at idle/low speeds. I've done all but (2) recommended items since purchasing used last year <250 hours>. Still need to clean the o2 sensor, that I'm sure needs it. The second item/check was to validate...
I picked up a new used Pursuit 2470 with a Yamaha 250 OX66 99'. The engine SN# is 61AX102114U with 250 hours. Owner used Ring free and Yamalube which I too have used for 1st season. Put 60 hours on engine last year. ISSUE - At times I experienced a loss of RPM when I went WOT quickly....esp...
