An excellent modification

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May 11, 2005
3,431
Seidelman S37 Slidell, La.
Finally got around to doing something I have been promising myself for a long time. Pulled the oil pan off the Yanmar, drilled and tapped and installed a drain plug. Added a ball shut off, and viola. No longer do I have to do the dipstick two step. Ran it today, checked for leaks,( none ) and drained it. It was so easy, I should be whipped for not doing this sooner. Biggest problem was getting under the engine, and scraping off the old gasket material.
Other than checking everything over one more time, that is the last thing on the to do list, before I head out for the Yucatan and Belize. Target date to leave. Nov. 15
 

zeehag

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Mar 26, 2009
3,198
1976 formosa 41 yankee clipper santa barbara. ca.(not there)
congratulations.
how long will the trip last for you??
 
Jan 22, 2008
8,050
Beneteau 323 Annapolis MD
If you drilled an tapped, were you confident the pan was thick enough to do that? Or maybe you also welded the fitting? Or if NS thread, backing washers/nuts? Any sealant? Inquiring Yanmar (3YM20.
 
Jan 22, 2008
321
Hunter 29.5 Gloucester, VA
Thought of doing that myself but laziness has won out everytime. Any pic's by chance?
 
Nov 6, 2006
10,220
Hunter 34 Mandeville Louisiana
I have geared up to do exactly the same, Phil. Just bought a M14X1.5 tap to install the fitting. .. Looking forward to not having to putz around with the ^&*&% suction tube when changing oil.. and actually being able to get most of the old oil out.
 
Jun 6, 2006
6,990
currently boatless wishing Harrington Harbor North, MD
If memory serves, the pan has a flat reinforced spot where the drain plug would be if it was not a marine engine. They install them in tractors with the drain plugs.
 
May 11, 2005
3,431
Seidelman S37 Slidell, La.
Drill and tap

There is plenty of meat in the pan. At the very rear there is what I would think was an area that would have held the drain plug if installed. I used a 1/4NPT brass nipple, 3/8 tubing and a ball shut off valve. Have enough tubing to hang it above the level of the pan.
I expect to take three weeks or so to get to the Yucatan. Diddling along the Florida coast, over the the Tortugas, then into Isla. Gonna stat down there till summer returns.
 
Jan 2, 2008
547
Hunter 33 (Cherubini design Forked River, Barnegat Bay, NJ
I did the same thing to my 3GM30 years ago before I installed it. Engine is too close to hull to get a pan below it so I set up a vinyl hose arrangement below the pan. I can now poke my drain oil pump into the hose and suck the drain oil out from below the engine. Quick, convenient, complete drain, and I haven't spilled a drop yet (knock on fiberglass).
 

zeehag

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Mar 26, 2009
3,198
1976 formosa 41 yankee clipper santa barbara. ca.(not there)
good plan, phil--i hope all goes well and that you stay warm. if i get thru canal this spring, i may just turn left-- but at present i may just stay in panama if the place is friendly to po folk.....make a kind of base for furycame season then wander north periodically. i really have enjoyed mazatlan for this part of my trip.
 
Oct 1, 2011
188
Hunter 42 Passage Huron, OH
Nice N Easy, this isn't intended to be a thread highjack, so my apologies. I am in complete envy of your trip to the Yucatan and Belize. What an awesome and exciting trip this must be. Might you post some sailing photos as well as some of your destinations. We dream of doing this one day...and again, not an intentional change of topic... It simply just sounds awesome and I had to comment... Be safe and enjoy...
 
May 11, 2005
3,431
Seidelman S37 Slidell, La.
Posting about trip

Brian,
I will try to post up as much as I can, and pics or course. Leaving a little later than I wanted, but seems there is always just one more thing that has to be done. The oil pan was pretty much the last thing on the to do list. This has been on my agenda for several years, but in the past seems like something has happened. Katrina, oil spill, a death in the family. All seem to have been timed to spoil my trip. But this year, HOO YAA.
 

zeehag

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Mar 26, 2009
3,198
1976 formosa 41 yankee clipper santa barbara. ca.(not there)
glad you are going finally.do you have good crew!?? smooth sailing. you will find wifi in mexico almost adequate.
 
Feb 1, 2011
281
sail boat dock
My '91 3gm30f oil pan has a deep waffle pattern on the bottom of the pan, can you post a pic of yours to compare? I can't see a spot like you describe, Nice n Easy.
This would be a great mod to do.
Thanks in Advance
 
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