93 omc 3.0 cobra

[bago]

After summerizing the boat started to overheat ,so I cleaned the riser,that was blocked and tested the thermostat.The next day I tested the boat and noticed something different from what was normal before.The engine relatively easy reached 180 degrees at full load and when idling dropped to 150.I am a bit annoyed since it never reached 180 last summer.is that still normal?Also when steering at speed a noise from the outdrive was noticeable-bad u-joints may be?Thank you in advance!

 

[Dakota47]

Re: 93 omc 3.0 cobra

I bet your power steering cooler/heat exchanger is clogged. it gets the water right after the impeller and before the thermostat. did it get winterized??

 

[bago]

Re: 93 omc 3.0 cobra

It is a raw water cooling system.I might presume that more debris from the system have gathered in the straits at the riser -manifold connection.Won`t they be washed away after some time?The engine was winterised dry.

 

[sea wolf]

Re: 93 omc 3.0 cobra

When's the last time u changed the impeller?

 

[Dakota47]

Re: 93 omc 3.0 cobra

If you have a power steering pump on there you have a Cooler too. follow the lines.. its either on the back of engine or the port side.

 

[sea wolf]

Re: 93 omc 3.0 cobra

The noise you're hearing could be the u-joints, or it could be the gimbal bearing. You can grease the gimbal to see if it quiets down. But, I suggest you pull the drive to examine both. If either one dynamites u could be looking at some serious damage. Not worth the risk.

 

[Bondo]

Re: 93 omc 3.0 cobra

It is a raw water cooling system.I might presume that more debris from the system have gathered in the straits at the riser -manifold connection.Won`t they be washed away after some time?

Ayuh,....

I'd sooner think that it's Way Overdue for Replacement.......
Both Manifold,+ Riser....

 

[bago]

Re: 93 omc 3.0 cobra

I took the outdrive out .The gimbal bearing was roasted.The u-joints might tolerate some greasing,but the belows should be renewed.How about my temperature issues?i don`t have power steering.Thanks!

 

[Dakota47]

Re: 93 omc 3.0 cobra

Back flush the system ,, get all the old impeller pieces out. and install new impeller & housing,, new gaskets too.