WH 520H oil consumption

[BaySide1 138]

Just wondering what a normal Onan 20HP  P220 uses for oil on an hourly basis on a motor with say 525 hours

 

Thanks

[Adams94 1,069]

I would say basicly no oil per hour

Edited March 13, 2017 by Adams94

[Ed Kennell 42,078]

None for mine.

[Kurt-NEPA 755]

Same for me,  Both of my 520H's use no oil between oil changes.

[WHX?? 51,806]

Not a drop here with 8 & change hrs.....havin problems?

[BaySide1 138]

recently picked this thing up. Does not smoke (that I can see) when running. However, When I got it had to add oil. Now, after 3.5 hours I just added another 1/2 quart. Still not up to the top line.

Figured I would let it sit overnight and check before firing up tomorrow.

 

It smokes for a second when started using choke. I almost expect that. Then, like I said nothing I can see.

 

Not a happy camper. Pretty sure the PO is a member here. Not sure if he is current here.

[WHX?? 51,806]

Keep an eye on it Bay..in all their quirkyness they were never really know for using oil. In no offence to the PO when was the last time the oil was changed?  Maybe not the type or weight of oil in it that she or we like? Generally we all change fluids/filter on a new to us tractor just because then we know what's in it and when.Keep us posted 

[WVHillbilly520H 10,376]

Look behind PTO pulley ,the bearing retainer/seal and Welch plugs sometimes weep leak and check the oil drain at the pan as they tend to loosen over time also check to make sure oil filter is tight on the fitting, just some things to look for, and all last summer mowing in 90° heat just a pint after 60 hours.

[BaySide1 138]

19 minutes ago, WHX9 said:

Keep an eye on it Bay..in all their quirkyness they were never really know for using oil. In no offence to the PO when was the last time the oil was changed?  Maybe not the type or weight of oil in it that she or we like? Generally we all change fluids/filter on a new to us tractor just because then we know what's in it and when.Keep us posted 

the oil is clean. Plan on changing as soon as the weather warms up

15 minutes ago, WVHillbilly520H said:

Look behind PTO pulley ,the bearing retainer/seal and Welch plugs sometimes weep leak and check the oil drain at the pan as they tend to loosen over time also check to make sure oil filter is tight on the fitting, just some things to look for, and all last summer mowing in 90° heat just a pint after 60 hours.

 

15 minutes ago, WVHillbilly520H said:

Look behind PTO pulley ,the bearing retainer/seal and Welch plugs sometimes weep leak and check the oil drain at the pan as they tend to loosen over time also check to make sure oil filter is tight on the fitting, just some things to look for, and all last summer mowing in 90° heat just a pint after 60 hours.

 

Just now, BaySide1 said:

the oil is clean. Plan on changing as soon as the weather warms up

have not seen any leaks.

the owners manual states there is a standard pan and a deep pan. wonder id I have a deep pan and a standard dip stick?

[WHX?? 51,806]

Thats not impossible but unlikely. Maybe our resident Onan specialists can chime in @boomers_influence @onanparts.com on that. 

[Ed Kennell 42,078]

The adapter plate that the oil filter screws into has a poor gasket arrangement to the block and has a history of leaking.

  You have  to remove the tins to replace this gasket. But that should always be done on any newly  acquired used 520 to clean the cooling fins.

If it is leaking, the oil will be blown across the rear cylinder keeping them wet and sticky with oil and causing the grass clippings to stick and clog the cooling fins.

[lynnmor 7,833]

13 hours ago, Ed Kennell said:

The adapter plate that the oil filter screws into has a poor gasket arrangement to the block and has a history of leaking.

  You have  to remove the tins to replace this gasket. But that should always be done on any newly  acquired used 520 to clean the cooling fins.

If it is leaking, the oil will be blown across the rear cylinder keeping them wet and sticky with oil and causing the grass clippings to stick and clog the cooling fins.

 

The surface is just die cast and should be machined to make it perfectly flat.  If that is done, there should be no more problems in that area.

 

I have three P220 Onans, one from new.  They all use a bit of oil.  I keep mine at the full mark and add maybe 1/4 cup every ten hours.

 

One quirk with these engines is that the oil craws up the dipstick tube and reads high.  Always wipe the stick and check again.

[cleat 7,260]

Most engines with large dipstick tubes like that have the same problem.

 

Tecumseh lawnmower engines do the same thing.

 

I just unscrew them and wait a minute or two for the oil to drain down then check.

 

Cleat

[Ed Kennell 42,078]

Yeah, the tall chute blower prevents the hood from opening fully on the 520 making it difficult to pull the dip stick w/o rubbing the side of the tube and smearing oil way up the stick..

Yeah, the tall chute blower prevents the hood from opening fully on the 520 making it difficult to pull the dip stick w/o rubbing the side of the tube and smearing oil way up the stick..