opti-max screwing up again

sounds more like a fuel issue,,,but like BCB stated, a rare occasion on 150s.

bass1958 wrote:I think when you hear about engines that have one problem after another that it may be connected. In other words, one problem precipitates another problem. Example: I had a coil go out in my truck once. That also screwed up the plugs and O2 sensors. A couple of weeks later the catalytic converter went out. All the following problems were related to the coil going out. Could something like bad gas, or water in it, make a coil go out then later cause other problems down the line?If you have a newer truck with separate coils per cylinder a coil would have only screwed up one plug. The O2 sensors were probably good and the catalytic converter was the problem all the time. You would have to drive it for along time while missing to put enough raw fuel through the converter to make it go bad and probably wouldnt ruin it then. But to answer your question, no bad gas wont make a coil go out but might could ruin plugs but not likley.

I maintain a fleet of Helicopters for a living and have been a mechanic all my life. OIne of the very best things to do is record EXACTLY what the symtoms are for the shop. Water temp, water preasure, fuel flow if you have smart guages. Make sure you add to it any gas issues, although I ASSume the 150 has a water sensor warning. After you get that all written down, take it to a AUTHORIZED shop and go over exactly what the symtomes are and what was done so far. Start withthe basics, hard to believe a newer motor has O2 sensor issues, coil issues or anything else. These should go for 10 years in a outbord. It could be as easy as a spark plug wire not seated (I did this after having my 225 run like crap, changed 100 bucks worth of plugs, still ran bad and it was a wire not snapped on).Make sure the shop puts the analyzer on it and runs all the diagnostics. I own one of these myself. Ask to see the readings and compare to normal chart info. Bottom line is accurate, simple, complete and you will get there. good luck.Milton

Run it up to EK one morning and let him have a crack at it.