D4-300 Engine Oil Consumption at 3000 RPM

[Kaptajnen]

We just completed a 30 NM cruise running at 16 knots average at 3000 RPM.
The dipstick level was halfway between the MAX and MIN marks before we started.
After arrival, the dipstick level was at the MIN mark.
According to the factory manual, it takes 0.3 gallons to bring the oil level from the MIN to the MAX mark.

So, I am wondering if it is normal for the engine to consume 16 ounces of oil going the above distance and speed?

Thank you.

 

[Eric R]

We just completed a 30 NM cruise running at 16 knots average at 3000 RPM.
The dipstick level was halfway between the MAX and MIN marks before we started.
After arrival, the dipstick level was at the MIN mark.
According to the factory manual, it takes 0.3 gallons to bring the oil level from the MIN to the MAX mark.

So, I am wondering if it is normal for the engine to consume 16 ounces of oil going the above distance and speed?

Thank you.

How long did you wait before checking it? I’ve noticed it takes my D4-260 quite awhile for everything to settle back down and give an accurate reading.


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[Kaptajnen]

Waited overnight...

 

[BB marine]

First check evidence of an oil leak around the engine area. I would confirm that the boat is floating level or floating the same way when checking the oil. I don't know the dip stick configuration with a D4. The D3 I always have the dip stick handle facing fore/aft and the min/max engravment facing up. Insert the stick the same way. If adding I would not add to the full max. I would put the level at the as found 1/2 way between Min/max run the boat again let it sit over night and recheck.I would not fill to the full max. (You do not want it to be above Max.) Checking with a repeat procedure, level boat, dip stick inserted the same way. I you find that you lost oil again I would inspect the engine ventilation filter. Monitor oil consumption and record for 10 hours of run time. It is not normal to consume oil in in that short time and distance. But there could be some variables that contributed to the level change.

 

[Kaptajnen]

First check evidence of an oil leak around the engine area. I would confirm that the boat is floating level or floating the same way when checking the oil. I don't know the dip stick configuration with a D4. The D3 I always have the dip stick handle facing fore/aft and the min/max engravment facing up. Insert the stick the same way. If adding I would not add to the full max. I would put the level at the as found 1/2 way between Min/max run the boat again let it sit over night and recheck.I would not fill to the full max. (You do not want it to be above Max.) Checking with a repeat procedure, level boat, dip stick inserted the same way. I you find that you lost oil again I would inspect the engine ventilation filter. Monitor oil consumption and record for 10 hours of run time. It is not normal to consume oil in in that short time and distance. But there could be some variables that contributed to the level change.

Thank you Brian,

Will check your recommendations when I get back to the boat. I am not sure where the engine ventilator filter is on the D4-300. Perhaps someone can point me to the location?

 

[Eric R]

First check evidence of an oil leak around the engine area. I would confirm that the boat is floating level or floating the same way when checking the oil. I don't know the dip stick configuration with a D4. The D3 I always have the dip stick handle facing fore/aft and the min/max engravment facing up. Insert the stick the same way. If adding I would not add to the full max. I would put the level at the as found 1/2 way between Min/max run the boat again let it sit over night and recheck.I would not fill to the full max. (You do not want it to be above Max.) Checking with a repeat procedure, level boat, dip stick inserted the same way. I you find that you lost oil again I would inspect the engine ventilation filter. Monitor oil consumption and record for 10 hours of run time. It is not normal to consume oil in in that short time and distance. But there could be some variables that contributed to the level change.

Thank you Brian,

Will check your recommendations when I get back to the boat. I am not sure where the engine ventilator filter is on the D4-300. Perhaps someone can point me to the location?

I have the D4-260, but it should be the same. It’s right next to the oil extraction tube. Twist the cap off and the filter pulls straight up and out.

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[Kaptajnen]

I have ordered an Air Filter P/N 21702999 from Richard at Ranger Tugs. Since it was not changed after 200 hours I suspect that it is clogged and is causing the problem.

The photo you sent shows the flat air filter box next to the round “device” you indicated. What is that?

 

[Eric R]

I have ordered an Air Filter P/N 21702999 from Richard at Ranger Tugs. Since it was not changed after 200 hours I suspect that it is clogged and is causing the problem.

The photo you sent shows the flat air filter box next to the round “device” you indicated. What is that?

That part number is for the regular air filter, which I think you would definitely want to change if it hasn’t been. You also want to check the crankcase ventilation filter as I circled on the photo. That is a different (and unfortunately more expensive) part that takes care of filtering oil vapors and such from the crankcase, also ensuring the there isn’t too much of a build up in crankcase pressure.



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[Eric R]

Crankcase ventilation filter for the D4 is
3584145.


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[Kaptajnen]

Crankcase ventilation filter for the D4 is
3584145.


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I have added the Crankcase Filter to my order from Richard.
I removed the Air Filter insert today and it was filthy!