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Merc 525 Oil Change

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Old 07-11-2006, 10:21 AM
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Default Re: Merc 525 Oil Change

I'll have to look again this week end. I looked for it last time I changed oil and never seen it. I wonder if they were on all of them or if the rigger had to do it.
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Old 07-11-2006, 12:44 PM
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Default Re: Merc 525 Oil Change

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Originally Posted by Dave M
On the 496's the hose is about 3 feet long. You can see it coming out of the pan in this picture. The other end stays clipped up near the intake. I guess you can clip it anywhere you want.
Dave,

What's on the end of the hose? What keeps oil from coming out if the hose were to fall on the bilge floor? Like i mentioned above the Ilmor has a -6 female str ftg w/ a plug in it.

Michael
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Old 07-11-2006, 12:59 PM
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Default Re: Merc 525 Oil Change

On my old boat, the hose was as described above and it had a threaded brass plug fitting at the end which capped it off. It was also wire-tied to the bilge drain plug which made it easy to pull out. The only problem was that it took over an hour for the oil to drain, even when it was hot.
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Old 07-11-2006, 03:40 PM
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Default Re: Merc 525 Oil Change

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Originally Posted by gsmith9898
I have the 525efi and I have not found the drain hose. How long is it and where do they tie it up?
It will probably be tie wrapped on the back of the motor where its very hard to get.Thats where mine was.Comes from merc that way.
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Old 07-11-2006, 04:44 PM
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Default Re: Merc 525 Oil Change

Looks like I'm going to have to look at a 496, 496 HO & 525 in person in order to be sure what the fitting size & thread type is so that I can include the proper fittings.

I have an inexpensive & simple way to speed up your oil changes. I can drain the oil in my twin Ilmors (approx 5 gals) in less than 20 minutes from hook up to clean up.
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Old 07-11-2006, 09:07 PM
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Default Re: Merc 525 Oil Change

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Originally Posted by NASCAT
Dave,

What's on the end of the hose? What keeps oil from coming out if the hose were to fall on the bilge floor? Like i mentioned above the Ilmor has a -6 female str ftg w/ a plug in it.

Michael
It's a brass pipe plug, 9/16 if I recall.
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Old 07-11-2006, 09:09 PM
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Default Re: Merc 525 Oil Change

Quote:
Originally Posted by CigDaze
On my old boat, the hose was as described above and it had a threaded brass plug fitting at the end which capped it off. It was also wire-tied to the bilge drain plug which made it easy to pull out. The only problem was that it took over an hour for the oil to drain, even when it was hot.
I've read about it taking a LONG time to drain but mine seems to drain pretty fast.
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Old 07-11-2006, 10:28 PM
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Default Re: Merc 525 Oil Change

I didn't know there was a drain hose, been pumpin' it up the dipstick. where does the oil go when you drain it out the hose, into the bilge? that wouldn't be good. which is easier??
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Old 07-11-2006, 10:48 PM
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Default Re: Merc 525 Oil Change

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Originally Posted by RJ1340
I didn't know there was a drain hose, been pumpin' it up the dipstick. where does the oil go when you drain it out the hose, into the bilge? that wouldn't be good. which is easier??
It's about 3 feet long so you'd pull the hose out the bilge drain hole and drain it into a collection pan.
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Old 07-11-2006, 10:54 PM
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Default Re: Merc 525 Oil Change

Quote:
Originally Posted by Dave M
It's a brass pipe plug, 9/16 if I recall.
Dave is that 9/16 wrench size or pipe thread?
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