Our 1985 C36 mk1 has a Universal M-25 with an old style Oberdorfer raw-water pump. I've been researching the quick change cover kits available and came across one advertised in my 'Good Old Boat' magazine, called 'speedseal life'. Details can be found on [url]www.speedseal.com[/url](link is external).
There's been a good deal of discussion on the upgrade already, anyone try out this type?
Comments???
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Paul Lipsit,
Zatarra #406
1985 C36 Mk1 S/R F/K
M-25 Universal Kubota
Port Dover, Ontario
Hi All,
Wow, it pays to use the 'search' feature properly!
I've now discovered previous discussions pertaining to 'speedseal' circa 2010. Any new comments???
Paul Lipsit,
Zatarra #406
1985 C36 Mk1 S/R F/K
M-25 Universal Kubota
Port Dover, Ontario
My experience is that with an Oberdorfer you just don't need it. There are four simple screws on the faceplate. Now, if you had a Sherwood...in which case I'd change it out to an Oberdorfer rather than buy a Speedseal.
Stu Jackson, C34IA Secretary, C34 #224, 1986, SR/FK, M25 engine, Rocna 10 (22#)
Paul,
I agree with Stu. The Oberdorfer on the M25 in a C36 is such an easy water pump to work on, it's almost literally child's play. Four screws, right in front of everything, and that's it. In other boats, or with other engines or water pumps, then maybe a Speedseal would be a good idea. Cross this one off the "To Do" list and proceed to the next item! :-)
Tom Sokoloski
C36/375IA Past Commodore
Noank, CT
After failure of 2 of the $ 400.00 Sherwood raw water pumps at about 100 hours of use - I decided to move to a$ 220.00 Oberdorfer. No more leaks. If you need images of how to modify them and where to buy them send me an IM - if you are in USA I will send you all the info you need.
Haro Bayandorian, 1999 C36 MKII, Sail La Vie #1787, M35B(link is external),
Coyote Point, San Mateo, CA.
The process to modify an Oberdorfer pump to replace the Sherwood on both the M35A and M35B was documented by Randy Sherwood and Nile Schneider in a JibSheet issue in 2010. I've pulled that part out of the JibSheet and put it into the upgrades section of the main website.
[url]http://www.c36ia.com/node/2329[/url](link is external)
Having just finished this mod in the fall I can vouch for it's relative ease of completion and definite ease of future impeller servicing!
---- Howard & Linda Matwick ----
--- S/V "Silhouette" - Nanaimo, BC ----
--- 1999 C36 MkII #1776 M35BC ---
[QUOTE=HowLin;21553]Having just finished this mod in the fall I can vouch for it's relative ease of completion and definite ease of future impeller servicing![/QUOTE]
It's even easier on the M25 engine. A straight swap. Just check the studs.
Stu Jackson, C34IA Secretary, C34 #224, 1986, SR/FK, M25 engine, Rocna 10 (22#)
What do you have to check on the studs on the 25xp?
Bill Miller
S/V Lorraine
Pacific Northwest,Sound Sound
Grapeview,Wa
1990 Mk1
[QUOTE=William Miller;21557]What do you have to check on the studs on the 25xp?[/QUOTE]
Bill, IIRC, never having had a Sherwood, the original and very well done C36 writeup of the Sherwood to Oberdorfer pump swap was for an M35 engine, but did discuss checking the # of studs because the Sherwood had a different mount. I recommend reading that writeup to see if it applies. It's not so much the location but the quantity. I simply personally don't know because my engine came with an Oberdorfer.
Stu Jackson, C34IA Secretary, C34 #224, 1986, SR/FK, M25 engine, Rocna 10 (22#)
Ready to buy an Oberdorfer N202M-16 after reading the numerous comments about replacing a Sherwood. Mine will go on an M35A so the mod looks easy. I do have a question regarding the flange, as the supplier I found offers the pump in a 2 bolt or 5 bolt configuration. Do the bolt holes not line up on the 2 bolt model? The Sherwood/Schneider write up in 2010 used a 5 bolt flange. Also has anyone used this model Oberdorfer for an extended period of time so I can get some feedback on reliability vs. the old Sherwood. Mine was 20 years old before a leak developed. (800 hrs.)
Thanks!
Attached is a spec sheet for both 2 and 5 bolt 202 pumps. There is a dimensioned drawing on it but no measurement for between the bolt holes. Likely a print off and measure job could give you an idea. No idea on longevity of one versus the other, but our Sherwood is original from 1995 and it's at about 1200 hours now. It seems the Sherwood is a die young or live to a ripe old age piece based on empirical evidence only. Aside from that, the Oberdorfer is so much easier to change impellers on that alone is enough reason to buy one.
Bud,
Thanks for your response. From the specs you sent it looks like the -16 model I need only comes with 5 holes. Yeah the impeller change on the Sherwood was a bear.
Andy