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[The long Build]

I have a boiler which when full to the top will hold 250ml.

What is recomanded level for best performance should you fill this to.

Larry

[derekwarner]

Larry....post a photograph of your boiler 

is it vertical or horizontal?
does it have a steam dome on top?
have you checked the Macsteam WEB site?...........I think this knowledgeable man  offers a few technical tips...

Derek

[The long Build]

Modeen Crompton

[gondolier88]

Rule of thumb is between 75-80% up your water gauge when the boiler is cold allowing for expansion when it's heated up.

Any more than that and you risk priming, or carrying over water into your engine.

However, if your gauge is low down on your boiler (it would help if you posted a pic of that end of the boiler) then you may get away with more.

Greg

[Bunkerbarge]

You have to remember that no matter what the boiler configuration or capacity is it is the gauge glass that dictates this so that you can see what is going on.

As a rule of thumb I fill up to 75-80% of the gauge glass and let it run down to about 15-20% of the glass.  Do not let it go out of the glass in either direction.

[derekwarner]

Thanks gondolier88 .....as previously mentioned......here is a simple extract from that respected site of Maccsteam  ...

"Fill the boiler by removing the safety valve and pouring in water until the gauge glass is approximately three quarters full"

.....and your comment ... "Any more than that and you risk priming, or carrying over water into your engine" is also an important understanding ......Derek

[Chuffy]

Larry

If your Crompton boiler is the same as mine and from the picture it would seem to be, you will not have a sight glass. I fill the boiler until the water dribbles out from the plug hole at the end. With the meths tank full the meths always runs out before the water, the engine seems to turn over quite sweetly on about 20 psi and gives a scale speed for 15 - 20 Min's.

Chuffy

[The long Build]

Hi All
Thanks for your replys,
 Yes Chuffy the boiler does not have a glass guage so sailing today I filled the boiler until it flowed out and then took some back out, also only filled the fuel to  about 90%, as you say it ran out before the water.

[rathikrishna]

Nice topic..helped a lots...thank you all...