Starboard at 9600 rpm WOT

[capt]

Ever since I bought it the starboard motor has topped out at 9600 rpm. I get 10200 from port side. I have put all new plugs in and still no change. I'm thinking it might be the throttle stop misadjusted. I also am curious if this looks right to y'all. Throttles all the way forward and the gates are not completely out of the way.

 

[Jeremiah]

I had lower rpms on my starboard engine. Like 7500. It was due to gas in the oil caused by wide open injector because of faulty cpu.

 

[atldude]

I had something similar when I first got mine with the starboard engine a few years ago. I adjusted the throttle body cable, oil and spark plug change and it went back to where it should be.

 

[atldude]

Here’s a good video though the location on my 06 is under the air filter housing iirc. The service manual has good maint procedure to adjust the gates within spec. You should still make sure they are good.

 

[marmstufl]

I had lower rpms on my starboard engine. Like 7500. It was due to gas in the oil caused by wide open injector because of faulty cpu.

This can also lead to a blown engine. I had a faulty cpu (ecu) that kept washing out cylinder #1 and cracking a ring. 2 blown engines later they figured it out... Thank God for warranties.

 

[Jeremiah]

I figured it out before that happened thank god. It’s a 2005 so no warranties lol.

 

[capt]

So how do I know of fuel is getting in the oil? And would this show up on YDS?

 

[Jeremiah]

The oil will be thin and lighter in color. It will also smell like gas. Use the engine oil on your “good” engine as a baseline.

 

[capt]

Check when oil is warm or cold

 

[Jeremiah]

Good question. Check it cold and then if you can’t tell run warm.

 

[Jeremiah]

Also, the engine in question should have a higher level if it is filling with gas.

 

[Jeremiah]

Also, the engine in question should have a higher level if it is filling with gas.

Engine oil

 

[capt]

thanks Ill have plenty of time to check this out before I get out on the water again. We have been having crazy wind lately. @Jeremiah

 

[Scottintexas]

While the ECU certainly could be the issue I would think it would be way down the list of possibilities without further indicators,

check your oil at every outing not only so that your not low on oil but that it's not overfilled (indicator of fuel being mixed in)

I would confirm with a YDS that your tach is correct then it's probably a case of throttle cable adjustment,

.

 

[capt]

While the ECU certainly could be the issue I would think it would be way down the list of possibilities without further indicators,

check your oil at every outing not only so that your not low on oil but that it's not overfilled (indicator of fuel being mixed in)

I would confirm with a YDS that your tach is correct then it's probably a case of throttle cable adjustment,

.

Good Advice

 

[Beachbummer]

What ever happened? Did you figure it out?

 

[capt]

What ever happened? Did you figure it out?

No I still haven't figured out why. Oil looks good. In planning on switching tachometer plugs and seeing if I have the same result.

 

[Beachbummer]

Ok. I'm experiencing something similar. I thought it was my rebuilt impellers, but i installed solas impellers and I'm seeing the exact same behavior as before. Troubleshooting without the air filter did not resolve. I'm going to check with the yds this weekend to make sure the TB sensors look good.