[C38] Steam Cleaner
Charles
charles at finn.ws
Fri May 8 13:29:10 EDT 2009
Max,
My bolts were most assuredly stainless! I had to cut that stripped bolt
out, which required four, separate cuts due to the spacer nuts that are
on the bolt that support the steering gear. This was by far the worst
maintenance experience I have had on the Mighty Quinn. Waaay back
before I was a professor, I was a "journeyman" tool and die machinist,
so I do know my metals! So here is my take regarding why Edson used
stainless bolts (strength being the major argument of course).
Stainless and aluminum are affected by galvanic corrosion (much worse in
saltwater environments). That corrosion will be governed by the ratio
of the anode area (aluminum) to the cathode area (stainless). Given the
size of the bolts and the relatively small contact area... I would
suggest their engineers figured the amount of corrosion would be within
some spec. Especially if there is some sort of insulator applied
between the metals (paint being a poor one, but I noticed the aluminum
binnacle tapered hole was painted). Remember that our masts are
aluminum and there is a lot of stainless attached to them as well.
Replacing stainless bolts with aluminum also requires some
consideration. For example you would need a 3/8 aluminum bolt to match
the sheer strength of a 1/4 inch stainless bolt (it has to be even
larger for bearing loads).
Hope this helps,
Charles Finn
Mighty Quinn #114
Great Lakes
Max Soto wrote:
> Charles;
> The Edson pedestal uses four half inch Aluminum bolts instead of
> stainless steel because they will corrode the aluminum. The previous
> owner replaced them on Estancia, and I had to paint the pedestal
> because the paint went off around each bolt.
>
> Regards,
> Max Soto
> C38 #198 ESTANCIA
> Puntarenas, Costa Rica
>
> 2009/5/8 Charles <charles at finn.ws <mailto:charles at finn.ws>>
>
> The engine out is a perfect time to get to your steering gear and
> rudder! It is also time to do any maintenance on your thru-hulls
> and to paint the engine area (white paint recommended to show
> leaks). I had a total engine overhaul done when I bought my boat
> and even crawled all the way back to have a look. Unfortunately,
> I didn't know about the propensity for the rudder shaft to leak at
> that time and did not install a "boot." I also decided to ignore
> the fact that one of the four 1/2 inch stainless bolts holding the
> binnacle down was stripped, and this really came back to bite me
> last summer! It is also time to take a good, hard look at the
> wiring harnesses for the engine as well as consolidating the many
> other wires strung through this area. And, I would carefully
> inspect the plywood underlying the cockpit floor that also
> stiffens the binnacle (I had to do this job last summer while
> cruising and it was awful).
> On the other hand, I did get two beer cans out that the previous
> owner said rolled and banged in almost any sea!
>
> I also:
> * replaced the engine mounts and beefed up the stringers.
> *removed, tested and cleaned the fuel tank.
> *made the ammeter wiring change Tom T. has told all of us to do.
>
> In closing I have to say that when I think of maintaining my
> boat... I sometimes dream about taking the motor out just so I
> can get to those unreachable spaces!
>
> Charles Finn
> Mighty Quinn #114
> Great Lakes
>
>
> Larry Malmberg wrote:
>
> A while back I talked to someone on the list and gave them the
> name and
> telephone number of a company in, I think, Los Alamitos CA
> that does
> portable steam cleaning. We have the engine out of Hassle and
> need some
> steam cleaning done. Can who ever send me the info.
> Also, any suggests of things to be done while the engine is
> out would be
> greatly appreciated! Thanks to all in advance.
>
>
>
>
> Best regards,
>
> Larry Malmberg-President
>
> Larry Malmberg Investigations and Security, Inc.
> 505 North Arrowhead Avenue - Suite 510
> San Bernardino, CA 92401-1200
> 909-383-8565, 800-655-4549 Facsimile 909-383-8566
> PI 15211, PPO 112446
>
> www.larrypi.com <http://www.larrypi.com>
>
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