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Member Since 04 Apr 2011
Offline Last Active Today, 12:30 PM

Posts I've Made

In Topic: Tick-over speed

02 December 2016 - 09:09 AM

By far the greater factors in disturbing a moored boat are depth of water its moored in and width of canal, allied to how well its moored. All this talk of engine idle speeds and passing on tickover needs to be tempered by these more relevant factors. Just observing your wake on the canals bank will give a good indication, and may be much greater with engine at idle than at normal crusing speed on many occasions.

In Topic: Ebay vintage engine sales

30 November 2016 - 11:02 PM

Lister FR3


In Topic: Removing pump out toilet and septic tank

29 November 2016 - 11:04 AM

Apologies for my ignorance, may I ask what the correct term is for such a tank then?


Well it certainly held septic contents at some time or other, but they are generally known as holding or waste tanks on boats. Septic tank is a more commonly used term for household waste storage in areas where mains drainage is not locally available.

In Topic: Sabb 2J - calorifier connection

28 November 2016 - 08:40 AM

I don't like the idea of prolonging the warm up time of any engine, the faster it's at operating temperature the better.


Therefore the idea of passing hot water to a calorifier and returning cold is less than ideal. A bypass is there for good reason.


One idea I have considered is using a thermostatic mixing or blending valve on the return from the calorifier and keel, such that when the return temperature of the calorifier is above a threshold the return feed would switch to the keel cold return.


Most radiators/engines work on a 20degsC temperature between input and output so if the engine is working at 70degsC the maximum return temperature is 50, so I'm make it initially 40. To be honest 70degsC sounds low and might be in part because of the very low temperature of the efficient keel cooling.


This is the sort of blender I would consider:



Not cheap I have to admit, but there might be others and may solve all your problems. I would think 28mm would be sufficient, anything larger becomes prohibitively expensive. 2 x 22mm would give almost the same impedance/flow rate.


Just an idea.



I agree that delaying engine warm up is far from ideal.  It must be considered though that wherever you plumb a calorifier, it will add to the heat soak. 


By far the best automated method is to employ a twin thermostat system as mentioned at the end of this post, and as shown/described below. Many larger marine engines employ such including the whole Barrus Shire range now. 



In Topic: advice re 1st time dealing with currents

27 November 2016 - 10:03 AM

Newbies with the task of moving our boat to Newbury from Aldermaston via Woolhampton once the lock opens again in late December. We understand Woolhampton Bridge and lock can be a bit of a challenge where the canal combines with the river. With winter rain etc we have concerns particarly as we have no experience of rivers and currents. Would it be adviseable to hire an experienced hand for the trip or is it just a case of taking extra care?


In this particular case just choose a day when it hasn't rained for a while. The current increases considerably as levels rise but quickly drop when the Mill owner opens the sluices on the bypass weir by Frouds Bridge marina, just downstream of Woolhampton.


If not in a hurry tie up downstream of swing bridge and enjoy a few pints and maybe a meal in the adjacent Rowbarge pub. Thus will give you time to suss out your tactics.


Suggest before moving you prepare the adjacent lock. Have someone then open the electrically operated swing bridge and power through. As you  approach lock mouth turn bow into the stream coming from your left. Once bow has entered lock mouth, probably at a fair angle, you can push tiller the other way to line up boat for lock entry. If all goes wrong the permanently moored boat to right of lock mouth is well fendered wink.png


If singe handing, choose a quiet time to least inconvenience motorists while swing bridge remains open.