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Topics - cmainprize

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Main Message Board / Coverting MK11 aft water tank to holding?
« on: February 08, 2011, 10:05:48 AM »

We are freshwater sailors and have not filled up the aft water tank for several years.  We have plumbed every fixture in the boat to lake water ( including hot water) except for a small tap in the the head and galley for brushing teeth and making coffee and cooking.  We use lake water for everything else.  We usually end up dumping the the bow tank before it's empty because we end up at a marina anyway for a pumpout.  

We need to get a pumpout every 7 days or so.  Two adults, two kids.  We could do all kinds of stuff to reduce our need for a bigger holding tank but we don't want to.  I think the aft water tank is 42 gallons and will be perfect.

So what I want to do is remove the port side holding tank and re plumb the waste line to the aft water tank.  If I can modify the tank that is there great, if I need to change the tank that's fine too.  The wast line will be a little longer and the tank is higher than the head.  I don't trust the joker valve to hold back 400 pounds of poo so I will put a shut off on the line when the head is not in use.  

any thoughts?

Main Message Board / Folding Wheel and Autopilot
« on: December 28, 2010, 07:38:46 AM »
My wife bought me a folding wheel for xmas (gotta love her).  When I was looking at it I noticed it is slightly convex/concave depending what side you look at.  Has anyone put a wheel drive autopilot on one of these wheels.  I was wondering if it is going to an issue or if fits with no modification.

Thanks in advance

Main Message Board / exhaust flange gasket
« on: December 25, 2010, 06:24:09 PM »
I need to replace the exhaust flange gasket on my m35.  I did this on my old m25 (C30) a couple of times.  The first time I did this I changed the gasket and it continued to leak.  Changed it again and add some high temp rtv and it worked. 

Does anyone have any concerns adding the rtv to the gasket.  Good, Bad, indiferent? 

I have seem some have gone this route and others have not. 

Thanks in Advance

Main Message Board / Hx Zinc Seal
« on: October 30, 2010, 09:23:26 AM »
I changed my HX zinc last week for the first time when we were hauled for the winter.  I am wondering if the new zinc is self sealing when it threads into the Hx or does some type of sealant need to be applied to the threads.  The old one appeared to have "pipe dope" on the threads.  I did not have any with me when I changed it so I used the Yellow (oil resistant) Teflon tape.  But now I am  second guessing my self.  The raw water system is drained so if I need to change it now is the time.  Thanks for your input.

Main Message Board / exhaust riser replacment
« on: September 04, 2010, 06:44:55 PM »
When I was cleaning out the HX last week I noticed some dampness aroung the exhaust flange.  I pulled back the fiber wrapping to get a better look and guess what.  The exhaust riser has been welded to the flange.  I assume it leaked exhaust gas at some point and instead of using muffler cement someone welded it.  The gasket area only showed a little dampness with no obvious leaking so the job will be added to my fall projects list when I haul the boat in six weeks. 
The weld job looks solid but I can't live with it.  I noticed catalina direct sells stainless risers.  My question is this, is it worth it to get a stainless riser made or should I just replace what's there and make one from black pipe?  The boat is in fresh water.  Obviously I need a new flange as well.

The PO is a friend who bought the boat new and he swears he did not have it welded.  He actually came over to look at it and had no idea.


Main Message Board / Normal Operating Temp M35
« on: August 16, 2010, 03:01:08 PM »
Looking for some info on the normal operating temp for a M35.  The Manual says normal is 165 to 195.  We usally run around 180 at 2100.  The boat is still fairly new to us and 180 has always seemed a little high for a engine speed of only 2100.  My M25 ran seemed to sit around 170. 
I fried an impeller yesterday just as we entered the point of no return in the marina.  The high temp alarm sounded just as we got into the slip.  Changed the impelller today (what a silly design) and went for a test run.  Lots of water from the exhaust but temp was running at 195 at 2100.  Had to limp it in to keep the temp down.  I was unable to find all the impeller vanes.  I got three out that were jammed in the pump casing and lots of little pieces.  Every vane was torn off the impeller.  I suspect it was on the verge for quite some time.  I was hoping luck was on my side and the rest went out the exhaust.  No such luck.  I will start the hunt for the rest of the pieces tomorrow. 

I was just wondering what temp the other members find there engines run at at say 2100 to 2500 rmp.
I was also wondering if the gaskets on the clean out covers on the HX are reusable once they are removed. 

Thanks for the advice.

Main Message Board / Mk 11 Davit Installation Additinal picture
« on: June 26, 2010, 06:33:47 PM »
Stern View

Main Message Board / MK11 Davit Installation
« on: June 26, 2010, 06:30:46 PM »
I have read several posts outlining different systems members are using to lift there tenders.  Attached are pictures of our davit system.  We mounted the davits as far outboard as possible.  Our aluminum bottom rib is 11.5 feet long and the mounting points on the rib are 80 inches apart.  The davits ended up also being 80 inches wide once they were mounted.  This is important because the lines run fairly from the mounting points inside the rib to the end of the davits.  The extra width also made for a perfect mounting point for for the solar panel.  The panel is almost 70 inches wide.  The stern rail seats put the davit quite far out over the stern and required the bottom of the davits to be bent aft to be mounted.  We also had padeyes welded to the top of the davit and we ran 3/32 coated wire to the masthead.  We use turnbuckles on the davit to tension the wire.  This was overkill but it does relieve some strain on the sternrail.
The davits have a 4 to 1 block and tackle system.  The engine side needs to be 6 to 1.  I can lift it but it is very heavy.  Our rib has a 15 hp two stroke engine.  The rib weighs 125, the engine is 75, fuel is another 50 pounds for a total of 250 pounds.  The solar panel also weighs 50 pounds.  It would also be common for us to have another 25 to 40 pounds of stuff (beach toys, chairs, propane tank) in the rib.  At this weight I can say the entire system seems bulletproof.  The davits are also high enough to drop the swim ladder with the dinghy up.  We can bury the rail and the dinghy does not drag in the water.
The davits were built by Stainless Outfitters in Barrie ON.


Main Message Board / crankcase ventilation-air filter
« on: May 18, 2010, 02:35:39 PM »
The M35 and M25 have a crankcase ventilation hose running from the top of the rocker cover that ends at or near the air filter assembly.  The system allows a small (or large) amount of oil contained in the vented air to drip out of the hose onto the engine or engine room floor. PIA

Many members have posted thoughts on sticking the hose into the filter so the oil is burned by the engine or into a can to be drained later.  Pros and cons to both solutions.

Our solution was to install a oil separator designed for crankcase ventilation from jegs.  The separator was $40 plus shipping and purchased on line.  We routed the hose from the rocker cover nipple to the separator and then from the separator into the filter.  The separator has a see through bowl that can be drained when the oil level rises.

The system works great, no increase in crankcase backpressure and the diesel smell seems to have dissipated.

Picture attached

Main Message Board / attaching pictures
« on: May 06, 2010, 05:07:27 AM »
Can anyone tell me how to attach a picture to the message board.

Thanks Cory

Main Message Board / washing mattress covers
« on: April 05, 2010, 06:12:11 AM »
Has anyone washed the fabric covers used in the veer berth or aft cabin?  The fabric used to cover the foam mattress's in our berths is different from the salon cushions.  I think many boats were done this way.  Just wondering if we can throw the covers in the washing machine and hang them to dry or if they shrink?

Thanks in Advance.

Main Message Board / Flexable Coupling
« on: March 24, 2010, 02:57:28 PM »
After reading all the posts on this site we decided to install a flexable coupling.  I went with the federal-43A.  This coupling was a direct replacement for the stock coupling.  The shaft did not require any modifications and the prop remained the same distance from the strut.  This coupling also allowed enough space for the PYI shaft seal. 
We purchased the coupling directly from federal in Florida.  Including shipping to Toronto it came to around $275.  It came with the required hardware, including the bolts and grub screws.  I think that is what the screws that go into the shaft are called.

The boat won't be back into the water for a couple more weeks, so I can't say if makes reduces vibs or not yet.  We also changed our cutlass bearing and installed a feathering prop (from a folding) so a totally accurate report is unlikely.

Just wanted to let everyone know how straight forward the install is with this model.

Main Message Board / Shaft removal????
« on: November 09, 2009, 04:11:54 PM »
Can the shaft be removed with the cutlass bearing and rudder in place.  I have seen a picture of it being done, but I cant don't want to have to bend the heck out of it to do it.  I am putting on a new j prop and federal flexable coupling so I plan to change the cutlass bearing at the same time.  I have seen the postings about greasing the shaft and what not, but has anyone actually done it.


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