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Old 15 June 2003, 14:42   #1
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Bravo 3 oil useage

Hi folks

Now I have got a few hours on my new RIB, 240 miles this weekend I am concerned about the amount of oil the outdrive is using. I am not seeing any oil in the bilges but maybe would not notice if it was going into the engine oil (Dont know id it could or not given the connection/drive train). When stopped I dont see any oil slick around the drive.

The drive is the Mercruise Bravo 3X on a Yanmar 240HP.

I find the oil reservoir goes from full to empty in about 5 hours continiuos running, and I have used a 1L of our in 25 hours use.
Running at about 2800 RPM, 25Kts.

Is this normal or do I have a problem

Regards Gary
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Old 15 June 2003, 14:47   #2
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Gary

I stern drive oil is the most frequent thing I replace in my engine bay but I would consider you usage shows a problem.

Last weekend I did around 450nm and can only see a small drop in oil.

Have someone check it out

Mark
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Old 15 June 2003, 15:33   #3
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Gary
Doesn't sound right to me either. The B3 does use a bit of oil (more than B1 or B2) but I reckon this usuage should not exceed more than a 1cm. drop in the reservoir per 100nm absolute max.
As Mark says-have it checked!
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Old 17 June 2003, 08:37   #4
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Hi folks

Spoke to Joe at Barrus who said they do use more oil then normal in the first 20 odd hours or so.

He said run it for a while longer and see it it changes.
If it does not their is a problem.
I have to fax them telling them of the problem now, to cover myself if it all goes wrong big style.

So I will run it for another 10-20 hours or so and see if it changes.

Thanks for you help

Regards Gary
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Old 17 June 2003, 19:43   #5
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Wheres it gone then??

Quote:
Spoke to Joe at Barrus who said they do use more oil then normal in the first 20 odd hours or so.
Gary

Read your last post with interest - could you do us all the favour of asking Joe at Barrus, exactly where this oil, that is used more in the first 20 odd hours, goes??
The leg oil is not vented in any way (i dont think) therefore it is being used up in an internal 'chamber' does that not equal - gase's, expansion, nowhere to go = Bang?? buggered leg??

On a more depressing note - to date - i change my leg oil every 170 - ish hours every time - without fail - and have never noticed any change in level, colour yes, but level no....

Cheers
Pete F
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