Mystery Hose in engine compartment, and oil question

Prairie Schooner

Jeff & Donna, new owners 7/21
As we look forward to our first winterization on our 'new' E35-3, I'm wondering what this hose might be. I can't make out where it goes under the engine.
mystery engine hose.jpg

Also, we're in RI. What kind of oil (weight? synthetic?) would you recommend for our Universal M-25?
Thanks,
Jeff
 

RCsailfast

Member II
I use Shell Rotella T6 15-40W oil.
I agree it may be an oil sump drain hose. Ours is on the Starboard side in front of the engine. It has a garden hose connector on it. I installed the other half to our oil removal pump and it works great.
 

Prairie Schooner

Jeff & Donna, new owners 7/21
Thanks everyone. I got back to the boat today, followed the hose, and it does indeed lead to the oil sump on the engine. Oddly, the drain is toward the front which, because of the tilt of the engine, is not at the lowest part of the pan. It looks like that could hold 1/4-1/2 a quart. I wonder if it's worth getting a thinner hose to snake in and go after that last little bit.
Incidentally, when the survey was done in July we had the oil analyzed and it was in quite good shape.
 

Loren Beach

O34 - Portland, OR
Senior Moderator
Blogs Author
I looked up a picture of an M25 diesel, on line, and the fitting for the dipstick is low down and on the side of the pan. Located about midway between front and rear. And, that looks like the pan on our former M25XP.

The hose that was fitted for oil withdrawal/changes later (optional until it was incorporated into all of the M25XP engines partway thru that model run) does replace the drain plug with a banjo plug fitting.
On our former '88 M25XP, that hose had been retrofitted by the prior owner. Due to leaks around the banjo fitting, I did have to replace the special washer on the fitting.
I used to put the thin end of the suction tube down that hose and could always suck out approx. one gallon of old oil. Then I would add one gallon of new oil. All in all, a pretty good system.
 

Christian Williams

E381 - Los Angeles
Senior Moderator
Blogs Author
And to toss in here what is usually said: warm the oil before extraction. This may require half an hour of engine idle.

If extracting through dipstick port, one of these makes this yearly task easy.

 

vasuvius

Member II
Yep looks like Oil drain hose. I did my first oil change on the M-12 motor a couple days ago. Ran the motor for 25 mins. Let cool for 20 minutes.
The hose setup on my boat is interesting - there's a smaller inner hose inside a bigger garden hose. The suction pump (Jabsco brass pump) fits on the smaller hose - 2 pumps and the oil started flowing. Pulled out 1.75 qts. Changed the filter and added the same amount. I used Shell Rotella 15-40.
 

markvone

Sustaining Member
Vasu,

The outer garden hose is just a chafe guard for the inner hose. I did the same thing when I installed my drain pickup hose. If you chafe a hole in the drain hose you could lose all your oil, possibly do some engine damage if not noticed and have a mess to clean up.

Mark
 

vasuvius

Member II
Vasu,

The outer garden hose is just a chafe guard for the inner hose. I did the same thing when I installed my drain pickup hose. If you chafe a hole in the drain hose you could lose all your oil, possibly do some engine damage if not noticed and have a mess to clean up.

Mark
Mark - Thank you for explaining. How often do you replace the drain pickup hose? or remove the chafe guard to check the drain pickup hose ?
 
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