Why don't you wire up the eber to your existing domestic battery and try it, there may be nowt wrong with it, if you're worried about the power consumption, run your engine at the same time.
bazza
Taken from the Webasto manual
When the temperature rises to reach 72° C the heater
switches to the energy saving part load operation. A rise
in temperature up to 76.5° C causes the heater to enter a
control idle period. This also happens when exceeding a
total heating operating time of 76 minutes.
After cool-down of the coolant to 71° C the heater
resumes part load operation. Another rise in temperature
to 76.5° C causes the heater to enter again the control idle
period. A drop in the coolant temperature during part load
operation due to an increased demand in heat will cause
the heater to switch to full load operation at 56° C.
hope this helps
bazza
Hi, I'm presuming you are talking about connecting into your existing fuel tank on your boat ?
The chemical metal idea would not be a good idea, not in my opinion.
Surely you must be able to connect into the fuel pipe that feeds the engine, after the main isolation valve from the tank, much safer.
bazza
I used one of these, it works great
https://www.t7design.co.uk/products/heating/heaters/1-7kw-panel-mounted-cabin-heater.html
did a post on it in boat building an maintenance, in 2015, but don't know how to link to it.
My first boat had a vetus 4.14 engine, I had a similar problem where there was just a clunk/click sound when the key was operated, if you gave the starter motor a clout with a mooring pin it turned over no problem, I stripped down the starter to find it was bone dry on the end bearing and rusty. Cleaned up and lubricated and no more problems, it could be the same problem.
bazza
Starrett hole saws are best . (not the cheapest )
If you are drilling cast iron do not use cutting compound or oil, it's best drilled without and at slow speed, the cutting compound /oil just turns the cast iron swarf into a paste which blunts the cutter in no time at all.
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