Hello all! New to Bass Resource and seeing if anybody has any suggestions. I was fishing a little lake with my 20 foot stratos and it was pretty weedy. Anyways I left my motor down while trolling around fishing and then when I started it an alarm started going off. Took it to the shop and they said it was my oxygen sensor. They unplugged it and said I didn't really need it anyway. My boat use to top off at around 68 MPH and now I'm only getting 61-63 MPH. I put premium gas in it and use Stabil Every time I put gas in it. Replaced the spark plugs this past year is the only other thing I have done. Anybody have any suggestions on why I lost my MPH or how to fix it would be GREATLY appreciated!
Thanks Guys
2000 - 20 SS Stratos with a 225hp Johnson