A Different Oil Change Question

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F

foolproof

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Jul 7, 2009
218
Catalina 30 Mark I Stockton, Mo
I have a Yanmar YSE12 engine in my boat, and I want to change the oil and filter before I close the boat up for the winter. Three questions:

1) What is the best way to get the oil out i.e. drain it, pump it, etc.

2) Is there a filter? I've never seen one, and the book is horrible in its literal translation from Japanese. It mentions cleaning the lube oil filter, but doesn't go into any detail. Anyone know about this?

3) Is there someone I could call who is knowledgeable on this engine? Maybe someone who could be a parts source as well?

As always, your help is appreciated.
 
Maine Sail

Maine Sail

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Feb 6, 1998
11,711
Canadian Sailcraft 36T Casco Bay, ME
foolproof said:
I have a Yanmar YSE12 engine in my boat, and I want to change the oil and filter before I close the boat up for the winter. Three questions:

1) What is the best way to get the oil out i.e. drain it, pump it, etc.

2) Is there a filter? I've never seen one, and the book is horrible in its literal translation from Japanese. It mentions cleaning the lube oil filter, but doesn't go into any detail. Anyone know about this?

3) Is there someone I could call who is knowledgeable on this engine? Maybe someone who could be a parts source as well?

As always, your help is appreciated.
Click to expand
Those engines use an internal "cleanable" filter. You will find a "church key" looking knob on a triangle shaped plate with three bolts. It is below and to the right of the oil fill cap. Drain the oil remove the three boats and slide out the filter assembly. Clean in mineral spirits or buy a new filter and o-ring and re-install. These don't use a typical spin on...
 
jrowan

jrowan

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Mar 5, 2011
1,294
O'Day 35 Severn River, Mobjack Bay, Va.
Mainsail is right. I used to have an S 2 with a Yanmar YSM 8 engine, almost identical to yours, & it had the same type of internal filter screen, with the turn key mounted on a triangular coverplate on the front of the engine block. The smallest Yanmars are rather primitive in design. No spin on oil filter, and no glow plugs. If you don't have good compression they won't start, period.
The drain plug is usually impossible to acess to drain the oil from the pan as there is no clearence underneath to access the drain plug. I would insert a cheap hand pump into the oil dipstick tube to suck out as much oil as I could. Its impossible to get it all out, but if you can get the pump's tube into the bottom of the oil pan then that's a good start. The engine only holds about 2.5 quarts. I used a cheap hand pump form Mallwort that will suck out the oil. Since there's are so cheap (about 8-10 bucks) I usually just toss the pump out with the oil, as its covered in oil & a big mess when your done with it. Remember to run the engine for a while to get the oil hot before changing it, as cold, thick oil is harder to pump out. I agree about the Yanmar manuals, crappy English translation from Japanese.
 
R

rogerlwhite

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Sep 11, 2009
24
Catalina Capri 26 Lake Pend Oreille, ID
jrowan said:
I usually just toss the pump out with the oil, as its covered in oil & a big mess when your done with it.
Click to expand
:eek: I'm sure you mean toss it into the collection bin at your local autoparts store where you take the used oil ... right?:D
 
jrowan

jrowan

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Mar 5, 2011
1,294
O'Day 35 Severn River, Mobjack Bay, Va.
Ahh, yes of course I don't toss motor oil into a trash can. Our marina & any decent marina has a used motor oil drum that you pour it into for recycling. Usually I give the pump to the mechanics in the yard, or a friend if they have a nasty job that they need to pump something out for. In my experience these pumps are very hard to clean once they're covered on a coat of old motor oil. I believe that Beta marine engines are the only manufacture that include an oil change pump into the design of their motors, which should be standard on all marine diesels, when you consider how may thousands you have to pay for them.
 
Chris Patterson

Chris Patterson

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Oct 17, 2011
2,809
Ericson 29 Southport..
You said that right rowan. I'm wanting one of those Beta's so bad I'm drooling. It strikes me as a fabulous design for a marinized engine, and my neighbor that has one, loves his.

(Must keep up with the Jones's)!!
 
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Stu Jackson

Stu Jackson

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Feb 26, 2004
23,053
Catalina 34 224 Maple Bay, BC, Canada
One doesn't need to change their engines.

Our M25 has a hose from the bottom of the oil pan.

I use a hand pump connected to it with cobbled together fittings.

Only difference between my rig and the Beta is that they simply mounted the pump on the side of the engine compartment.

On my "next to do" lost, but I've been doing it this way for the last 10 years, so other things on the list keep on coming to the top! :):):)
 
Chris Patterson

Chris Patterson

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Oct 17, 2011
2,809
Ericson 29 Southport..
The ol' Westerbeke changes like you said Stu, w/ a hand pump, and odd fittings, as I have the drain hose as well. My biggest irritation is the raw water pump impeller. STUPID place to put it.
That, and I'm just disenchanted with the Westerbeke people. AND their stupid diesel..

And I can't seem to figure out how to squeeze a Caterpillar 3115 in there.
 
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