Diesel Heater Advice

[Windpilot]

I used no sealant and there is absolutely no need for it in my install for the thru Hull. I did however seal all exhaust fittings with a fiberglass tape the melts. Available as muffler tape in auto part stores.

[pcmm]

Originally Posted by KenH

Thanks everyone!

One more question, Did any of you use 5200 or 4200 with the gaskets for the thru hole?
Just wondering if the gaskets work enough for sealing.

This is the one I was going to get.https://www.amazon.com/gp/product/B0...SUQG9XCW&psc=1

The one I bought came with a thick silicone gasket, but I used some high temp permatex also the fitting at this location isn't really that hot. I can touch it with my hand.

I don't use 5200 anywhere on my boat!

[mitiempo]

Originally Posted by KenH

Thanks everyone!

One more question, Did any of you use 5200 or 4200 with the gaskets for the thru hole?
Just wondering if the gaskets work enough for sealing.

This is the one I was going to get.https://www.amazon.com/gp/product/B0...SUQG9XCW&psc=1

Do not use 4200 or 5200. Use high heat silicone.

[newhaul]

Originally Posted by KenH

Thanks everyone!

One more question, Did any of you use 5200 or 4200 with the gaskets for the thru hole?
Just wondering if the gaskets work enough for sealing.

This is the one I was going to get.https://www.amazon.com/gp/product/B0...SUQG9XCW&psc=1

Just the gaskets afterall it is nowhere near the waterline and not on a flattish horizontal surface

[hpeer]

Used 5200 on my steel hull.

But it is not always a good choice. 5200 softens with hear.

I have a max length run so the pipe does not get very hot, and the steel mitigates what heat there is. So I have a very special case where 5200 works.

[DefinitelyMe]

I used this stuff. 5200 and 4200 both get very soft and gooey when heated. Standard bathroom silicone sealant would probably do the trick, but since I had this lying around I used it.

Update:
A week or so later and the heater is still working. I'm going to officially call it 'fixed', which I'm very happy about. Of course, now the temperature has warmed up to 20C and we don't need it any more...........

[hugosalt]

Good to hear your up and running.
Weather here in NY has slowed things down, however did check out my fuel delivery and exhaust (for sure more soot than one would think for a new unit) but not bad. So now I get to join in on the fun of removing, opening, cleaning unit. Only I foolishly used muffler cement joining condensation drain/exhaust to heater.
And will attempt to disconnect without destroying any bits!
Any thoughts on what to use? Dry ice? Thanks

[DefinitelyMe]

Ooooh, tricky. Well, according to someone Google found for me, apparently that stuff breaks down at about 315 degrees C. Maybe try getting it red hot with a butane torch and giving it a light tap with a hammer? Without breaking anything.......or setting fire to your boat!

[pcmm]

Originally Posted by hugosalt

Good to hear your up and running.
Weather here in NY has slowed things down, however did check out my fuel delivery and exhaust (for sure more soot than one would think for a new unit) but not bad. So now I get to join in on the fun of removing, opening, cleaning unit. Only I foolishly used muffler cement joining condensation drain/exhaust to heater.
And will attempt to disconnect without destroying any bits!
Any thoughts on what to use? Dry ice? Thanks

You'll be surprised how brittle exhaust cement is. I used it on all my joints and I was still able to easily diconnect the heater exhaust from the hose,

A lot of soot usually means you're burning rich. I've been really lucky With my CDH, but I clean it annually (Usually in the spring) but forgot this year with covid and all. Just cleaned it tonight and after running for a winter and a half of weekends (3-4 hrs each day) I only found 3-4 tablespoons of soot after taking it apart and cleaning the burn chamber. I use a small brass wire brush to remove the soot from the inside. I also have a pack of about 10 burn chamber gaskets and some metal gaskets for the fan assembly.

[hugosalt]

Finally back to heater last week. Surprisingly easy to remove muffler cement, gently used some leverage to loosen (Yes PCMM cement was very brittle).
Found a partial blockage in exhaust right at heater. Even though I used sparingly(so I thought)and (I think) used on male only so cement would be pushed out was enough to partly restrict exhaust.
Tested and started/heated right up.
Will run hot and heavy for a while and hopefully will not have to open up burn chamber.
But will order and keep spare gaskets and atomizer screen on hand.
Thank you

[DefinitelyMe]

I give up. It's doing the same thing again. I can't be taking this damned thing apart every third time I use it. I'm writing it off as an expensive mistake............

[pcmm]

Originally Posted by DefinitelyMe

I give up. It's doing the same thing again. I can't be taking this damned thing apart every third time I use it. I'm writing it off as an expensive mistake............

Go into the menu and write out your settings. I’ll bet they’re set way too rich. I’ll check mine to,or row and see what I have mine set to.

[Cpt Mark]

Originally Posted by DefinitelyMe

I give up. It's doing the same thing again. I can't be taking this damned thing apart every third time I use it. I'm writing it off as an expensive mistake............

I paid $108 USD for mine, 5kw. Worked perfectly until I noticed that after I insulated the hot air tube going onto the cabin the high temp silicone was now bubbling at the exhaust connections. Took it apart and used exhaust cement. What a clustrf*ck that turned into. The excess had balled up, got hard and prettty much closed down the exhaust which then sooted up the unit. Ok. lesson learned. Used the highest silicone sealant I could find ( a bit higher temp then the the cement) and only after the pipe was 1/2 way up the joint so any excess couldn't cause a bloackage. Cleaned it, put it back together.

Works mostly. I get error code 5 and 8 and once 10. What I've started doing is to run it on max for at least 30 minutes once a day and always just before shutdown. I changed my pulse rate to go higher then original. theory is this is burning out the soot that gets created. Seems to be the answer so far.

Good luck

[Leighpilot]

Yeah that’s part of the secret. I use kerosene as it’s cleaner burning and definitely run it up to max for a few minutes before starting the shutdown cycle.

[DefinitelyMe]

Originally Posted by pcmm

Go into the menu and write out your settings. I’ll bet they’re set way too rich. I’ll check mine to,or row and see what I have mine set to.

1.00Hz min
3.00Hz max
1500rpm min
4300rpm max
SN-1
PF-5
Off

Bearing in mind that mine is the 2kW version which uses exactly the same dosing pump as the 5kW version but just has a smaller burn chamber I'd probably want a leaner burn than most I think? I haven't adjusted these parameters from the factory settings.