Yamaha AR230 2008 question

[CRAIG STEFICK]

Hello,

I own a 2008 Yamaha AR 230. I have owned it for 1 year. I stored it for about 6 months and did not use Sta-bil (dumb move I know). I serviced the oil, filter and plugs. When I took it out one of the motors would not perform the same as the other. It would stop at about 8500 RPM. I’m thinking the injector or fuel lines were clogged with bad gas. I just bought Sta-Bil 360 marine to put in my gas tank. Will this work or should I get an injector cleaner and what kind? Thanks for any help you can give. The other motor runs like a champ.

The boat is in freshwater.

 

[Jgorm]

Pull the plugs and see what they look like. It's not the lack of stabil. Check the throttle opening all the way too.

 

[CRAIG STEFICK]

How do I check the throttle opening all the way? Thanks for the help

 

[GTBRMC]

Quite likely it is the spark plugs. Change them in both engines.... look for differences in plug condition from one engine to the other and from one cylinder to the next within the same engine. Keep track of which plug came from which engine/cylinder... this could prove useful if further troubleshooting is required.

BUT... strongly suspect plug change will solve the issue. MR-1 engines are quite plug-sensitive. Good luck!

Edit: just re-read where you said you "serviced" the plugs... did you replace with fresh plugs already? What type of plugs? If iridum, normal recommendation is do not mess with gaps as the electrodes are very fragile. If not iridium, checking gaps is not a bad idea.

...if you did anything other than replace all plugs with fresh plugs that meet OEM specs, do that next.

 

[zipper]

If you "serviced" the plugs, make sure they are all plugged back in. If you still suspect a fuel issue, add some new fuel, non ethynol preferred, and add some SeaFoam, it will cleanout any deposits in the fuel system or condensation left by untreated ethynol fuel in a less than full, while stored, fuel tank.

But if it was a fuel quality issue, I would expect to see similar issues in both engines.

 

[Scottintexas]

I also suspect plugs and even if you did service them before change them on that engine to brand new ones, it's an easy diagnoses and if it still doesn't work you still have a brand new set of plug for the next change,

If it's not plugs take your air cleaner off and look at your throttle cable to make sure it's has full movement, maybe when doing the plugs something is restricting it,

otherwise, Seafoam

 

[Cobra Jet Steering LLC]

Be sure you did not overfill the oil on the engine causing you issues or if it smells like fuel as you could have a defective injector leaking fuel in your oil and blocking your air filter element.

 

[CRAIG STEFICK]

So I just wanted to update my fix. I added Star-Tron and planned on running it out. Since a majority talked about the plugs, I went to pull them and inspect when I noticed that one of the wires came disconnected. Not sure how it came off but glad it’s fixed. Thank you all for the help!

 

[zipper]

Glad you found the problem, happy we were helpful. Thanks for following up.

 

[Scottintexas]

it's usually just that easy, a plug wire, a lanyard or switch or battery cable, always eliminate the easy stuff first