Ar 190 issues

[Plinkin]

Hey guys first time poster here looking for some help. I've got a 2012 ar190 that has around 220 hours on it no major issues until today I pulled it out cleaned it up and headed to the lake. The boat had been sitting for at least 6 months. The main problem is it will not get up to top speed, I usually can get to 40 mph but today it would only get up to 26-30. I also noticed that the rpms seem low it would only get up to 6400 at full throttle. Any advice is appreciated. Thanks.

 

[marcham]

Have you looked at the air filter?

Is the fuel fresh? Ethanol fuel is only good for 30-60 days.

 

[Plinkin]

I have not looked at the filter, I put 10 gallons in it today. I'm not sure how much gas was in it before. Somethings telling me to change the spark plugs. I'm thinking is doesn't have anything to do with the impeller/pump because it seems to be going the speed it should be for the 6400 rpms I'm getting.