Beta diesel engone stack tube removed, cleaned and replaced with new O-rings

Middle of January 2017 - Tied up in Marina Mazatlán, Mexico

 We did this heat exchanger stack tube cleaning on the Beta diesel engine sitting at the dock in Marina Mazatlin. Made for low stress as we did not have to go anywhere.
 Front of Beta engine. The black around the stack tube is the seal.
Front of Beta engine heat exchanger.

 Front of Beta engine.
 Rear of Beta engine heat exchanger before removing housing
that holds in the stack tube in the heat exchanger.

Engine stack tube housing end from back of engine. It contains the engine zinc.
We believe this is made of bronze and resists the saltwater corrosion well.
I am holding the rear of the stack tube housing up-side-down. The impeller pumps the salt water through some piping to the stack tube end cap housing. The end cap housing separates the stack tube so that the incoming salt water flows through the bottom half and then at the other end on the front of the heat exchanger the stack tube has another end cap so the salt water is forced back out the top half of the stack tube and then out the exhaust. This cools the antifreeze which this stack tube is surrounded by.  

You can see the corrosion around the aluminum heat exchanger housing.
The black ring is the seal. The seals should be replaced each year. These seals I left in too long. They have been in 2-3 years as I mistakenly thought they got replace at 750 engine hours. I'll need to read the manuals each time or set up a better engine maintaince schedule. However no harm no foul. There was no damage done to the housing and new seals will seal up just fine. 
Dirty stack tube. We did not have a problem with the Beta engine over-heating last season but it does look like it needs cleaning.
Some slimy water from stack tube.
 The rubber seal rests against the area shown.
Skewer stick Debbie gave me to clean the stack tube. It goes in about 3\4 of the way so we needed to slide in from both sides. Did one side at a time.

Here is the engine zinc and we were having problems sealing it. We were having to use Teflon tape to seal it when screwing it in. It seems our zinc template for cutting off the new zinc ended up getting too long. Then we would use it to cut the new zinc and the new zinc would be too long. You can see the zinc butting up against the edge of the housing, preventing it from screwing in all the way. Just not quite screwing in all the way I think. Next time we will cut the zinc a bit shorter and try it. I thought we had tried a shorter zinc but it still leaked but possibly we did not try a shorter one?
Zinc butting up against housing.
This time this whole procedure went perfect. It helps to be at the dock in a marina.
No pressure. The first time we did this we did it at anchor in Barra-Bahia de Navidad and there are a few tricks to it. I did it three times or more before getting it in and not leaking. Each time we had to replace the antifreeze as the salt water mixed with it.

Beta Stop Solenoid re-connected and heater hose secured

Middle of January 2017 - Tied up in Marina Mazatlán, Mexico
Got some more engine maintenance done. We re-fastened the water heater hose that comes out of the engine and runs to the water heater. As it comes out of the engine there is a check-valve then the black water heater hose. You see it taking a bend away from the engine and running along the engine space bulkhead. 

Water heater hose running along just below LED light.

The "Stop Solenoid" we disconnected when we had trouble with the Beta engine.
We started it when we first got back to Mexico this last Winter and it ran for 10 min and stopped. To troubleshoot the electric, we disconnected the "Stop Solenoid" at the suggestion of Beta support. Now to re-connected we had to find ground. Not easy as the wires are tucked in behind other items. So we dug out the wires and found ground. Marked it for future reference and re-connected the "Stop Solenoid". Now the Beta engine will stop when you press the "Stop" button on the engine control panel. We were using the emergency manual stop while we trouble shouted the engine and found it was a fuel problem. We found about the only way a diesel engine will stop running is if it runs out of fuel!! (Explanation in a previous post about the fuel problem we had.)

Got the "Stop Solenoid" plug out.

 Marked it "Ground" with black marker.
 Put the wires back and wire tied it all up.
All done and put away.
"Stop Solenoid"

Beta Diesel Engine cooling system cleaned\snaked

Beginning of January 2017 - Tied up in Marina Mazatlán, Mexico

 So what happen (we described in an earlier post) was we left San Diego with 50/50 antifreeze. We did not realize that the 38 hp Beta Marine Diesel engine we have wants 40/60 in the tropics. If I had looked at the manual close enough I would have seen the chart. But who reads manuals any way?
 So the antifreeze coagulated in spots and we have covered how we cleaned it up in the engine. However last season we noticed we were not making hot water when we ran the 38 hp Beta Marine Diesel engine. So this season we had to remove the Mermaid HVAC unit and decided to find and repair the problem if we could with the hot water heater.
We unfastened the return heater hose from the engine space.

With the 12000 BTU Mermaid Marine HVAC unit out we
were able to get to the engine out heater in hose.
We disconnected it.

After removing the hose we immediately saw the problem.
The heater was clogged with coagulated antifreeze.
So was the heater hose. Not, as it turns out, solid all the way but in sections.
Clogged heater hose.
First with the hot water hoses removed,
 we tried to blow the clog out with the Dewalt air compressor.
That did not work at all. So next was snaking it.
Attempting to blow air through the heater pipe.
The clog went from the engine hot water out just past the check valve up to the hot water heater and then from the hot water heater to the accumulator tank. From the accumulator tank to the engine it was clear.

Hoses on the accumulator tank.
Removing the hose from the heater with the heat gun.
Hose off.
Hot water heater area. Running the snake into the hot water heater.
Snake going in one side of hot water heater and coming out the other.

More snaking. Once we were satisfied we cleared the hot water heater,
 we moved on to the hoses.

We removed the clogged heater hoses and took them out to the dock.

We snaked the hoses out on the dock, clearing the clogs.
Snake running through the hot water heater hose.

Hoses cleared!
Re-snaking the heater hose return to the engine so it is better aligned.

Replacing the out heater hose from the engine to the heater.
Hoses all back together. We tested this cleaned out system with water we ordered from the tienda (5 gal bottles of water) and it worked fine. Now to move onto the next project, removing the 38 hp Beta Marine Diesel stack tube in the heat exchanger and cleaning it, replace the seals and fill the 38 hp Beta Marine Diesel back up with 40/60 antifreeze. (That's another post!!

Computer external keyboard and mouse cannibalized

Beginning of January 2017 - Tied up in Marina Mazatlán, Mexico

  We have a misbehaving keyboard and mouse (external USB) and had a spare set but the keyboard batteries corroded inside making it not work. The mouse will not work with the old USB wireless adapter. Debbie took apart the two keyboards and got the spare to work with the current USB adapter. That now makes life easer on the keyboard side of it. The mouse still double clicks at random, closing programs etc. Creates havoc! Aaaahh, but they are several years old and cost less than a pizza so we got more than our use out of them. We will put them on the shopping list. 

Cockpit light shaded for ombiance

Beginning of January 2017 - Tied up in Marina Mazatlán, Mexico

Here is an old anchoring light we had from a swap meet.
The auto-turn-on\off no longer worked so we pushed the two leads on the little mother board inside the light together. Now we plug it into the 12v cig lighter plug we have in the cockpit and it goes on. It is a little too utilitarian so we went to Home Depot and picked up a shade. The shade makes the light much more hospitable and we had converted it to LED years ago.

New Home Depot shade.

The shade just slid over the plug and onto the top of the light, wala!
Now it gives us just the right amount of light!
We had a string of LED solar powered lights for the cockpit but they were a lot of light.
Also due to some age they would fade out before midnight. Not that we get back that late but at anchor a cockpit light is good so the pangas can see you.