What could be the problem?

[putergod]

I have a 2006 205 Utopia SE (twin rotax 155). I changed the oil in both engines this past weekend but following the instructions I've found online with one exception. Putting the throttle all the way forward did not "turn the engine over", so I basically had to start them after each extraction. However, they never ran for more than .5-1 second. After getting what I believed to be the bulk of the oil out, I added 2.5 quarts to each engine. I then decided to crank the engines for a few seconds to cycle the fresh oil through then recheck. When I cranked the engines, they ran for about 5 seconds (at most) and the starboard engine started making a loud screeching sound so I immediately shut them both down.

Does this sound like the engine or the jet? Is it possible that something got sucked into the jet causing this?

Thanks in advance!

Mike

 

[Coastiejoe]

First check the engine oil.
Pulling the pump is easy and MUCH cheaper than any potential engine issue. So I would pull the pump and PRAY you find an issue with it.

 

[putergod]

The engine had oil, at least 2.5 quarts (depending on how much is left after extracting it). I'll check it tomorrow evening (after all the weather passes), but itll be this weekend before I can attempt to pull the jet (which I currently have no clue on how to do).

 

[JPass]

before I can attempt to pull the jet (which I currently have no clue on how to do).

Super easy to pull the pumps. Remove the following:

- Steering cable linkage from the nozzle arm.
- One end of the steering linkage arm that connects the 2 nozzles.
- Reverse bucket linkage.
- Jet pump nozzle
- Jet pump

Pretty simple 10 or 11 bolts.

This video is for a ski, but the nozzle and pump removal are the same. The video doesn't show removal of the steering and reverse cable linkages, but it's super straight forward.

[video=youtube;axU-9Wi_Y-E]https://www.youtube.com/watch?v=axU-9Wi_Y-E&t=50s[/video]

 

[putergod]

I checked the jets from the intake and output sides, and saw nothing in there; so I pulled the plugs and turned the engines over and they sounded normal. Put in new plugs, cranked the engines (very briefly) and they sounded normal, so I took the boat out, and it ran normal'ish. The port engine is running about 500 RMS higher than the starboard, and I have to hold the steering wheel to the left to maintain a straight track. Can this difference in RPM be enough to cause this? If so, how do I get them adjusted to spin at the same RPM?

Also, I did end up sucking something in the starboard jet near the end of our outing (can see a piece of vine still in it when I got it home), and the wear rings do look warn, so I think I should still rebuild the jets. What impeller would ya all recommend for maximum performance?

Is there anything else out there that can increase the performance of the 155hp engines?

Thanks!

 

[Coastiejoe]

Is there anything else out there that can increase the performance of the 155hp engines?

Thanks!

The 155 engine is really at its peak right from BRP. Officially, yes you can increase the power/performance. But it is VERY expensive for hr relatively small amount of gain. You could easily spend 3 grand and get 3 MPH.

One thing that may do and they "swear" they get a gain out of it is an engine intake upgrade. [MENTION=2]hfgreg[/MENTION] can give you some details on that.

 

[putergod]

Is there anything that can be done with the impeller/nozzle/intake grate that can increase overall performance/efficiency?

 

[Coastiejoe]

Is there anything that can be done with the impeller/nozzle/intake grate that can increase overall performance/efficiency?

Not really,,,
If you change an impeller that will give you higher speeds, you will lose the low end (hole shot) performance. If you add a "top-loader" intake, it will hook up better and handle better, but it will slow the ski down in smooth water and help in chop water. Without being able to increase the engine RPM, anything you do with an impeller or intake will be a give and take situation.
[MENTION=2]hfgreg[/MENTION], any input?

 

[putergod]

Any idea about the engine speed difference? Is it enough to push the boat to the right?

 

[JPass]

Any idea about the engine speed difference? Is it enough to push the boat to the right?

I would venture to guess there would be a noticeable handling issue with the engines not turning the same RPMS. One engine is pushing more than the other due to the higher revs.

 

[putergod]

How does one adjust the engines to spin at the same RPM for a given throttle?

 

[JPass]

Ours is controlled electronically with an indicator light in the gauge cluster. Not sure how yours is set-up. It appears to have cable actuated throttle bodies. I would assume you could inspect their respective travel and idle settings and see if there's any difference that would give you the difference in revs.

 

[putergod]

Ours is controlled electronically with an indicator light in the gauge cluster. Not sure how yours is set-up. It appears to have cable actuated throttle bodies. I would assume you could inspect their respective travel and idle settings and see if there's any difference that would give you the difference in revs.

Yours is drive-by-wire?

 

[go_panthers]

My old Sportster 1800 had two throttle sticks. I would just position them so that both engines were at the same RPM. Does your only have a single throttle stick?

 

[JPass]

Yours is drive-by-wire?

Yes. Our 2012 210 SE has a cable that connects to a control module under the helm. The module sends an electric signal to the servo controlled throttle bodies on the motors.

 

[putergod]

Yes. Our 2012 210 SE has a cable that connects to a control module under the helm. The module sends an electric signal to the servo controlled throttle bodies on the motors.

Sweet, wish mine did!

My old Sportster 1800 had two throttle sticks. I would just position them so that both engines were at the same RPM. Does your only have a single throttle stick?

Yes, the Utopia only has one control stick. It controls both engines as well as F/N/R.