springy

Dorman 3DA https://www.ebay.co.uk/itm/Large-Air-Cooled-British-Marine-Diesel-Engine-Dorman/153249997979?hash=item23ae69649b:g:v4QAAOSwww9b4piP:rk:36:pf:0 springy

I've also used Trefolex, Rocol, and a brown snot which I'm desperately trying to remember the name of -just had a quick google - Temaxol, though usually based on availability rather than a "best choice" and, in the absence of other alternatives, cooking oil. Any lubricant is better than none. springy

I've used mostly Starrett Bi-metal & found them to be pretty good, but as rusty said slow speed & lubrication. springy

If you have a Paloma or other instant water heater it will also need to be drained - the coil is very vulnerable to frost damage. springy

If its only for the shower then fit a Gulper, has to be switched manually but far less likely to result in a bilge full of water than a float box. beaten to it by mrsmelly springy

2 stroke engines which use ports uncovered by the piston are "direct reversing", for marine use they usually have symmetrical injection timing and "don't care" about their direction of rotation, not sure about other applications such as field marshall or lanz tractors. 4 stroke engines rely on half engine speed opening & c;losing of valves and the timing of those valves determines rotation. The ability to change the exhaust cam timing relative to the inlet cam timing (IIRC) allows a 4 stoke "reversible" engine. springy

Is it possible to drain the calorifier & then pressurise with air (being careful not to over pressurise) - you may then be able to use a liquid leak detector by bubbles to locate the actual leak ? springy

IIRC a "woodburner only" will burn its fuel on a hearth - no grate, - mine has a layer of firebrick, coal (& derivatives I presume) needs a grate to provide bottom air to maintain the burn, many multifuel stoves have an adjustable grate which can be virtually closed off for wood only. springy

Industrial HA2 https://www.ebay.co.uk/itm/Lister-HA2-Electric-Start-Diesel-Engine-19-HP-1500-RPM-Runs-Perfectly/352462963116?hash=item52106e01ac:g:yUEAAOSwHShbng9i springy

Is that just a vent, ? It looks rather like the exhaust for the gas flue for a three way to me. springy

If they are calor bottles then they are a 6Kg fill on Propane versus 13Kg, or 7Kg Butane versus 15Kg, The gas is also proportionally more expensive. In addition they seem to have changed their rules on exchanges between sizes slightly and to swap a 13 for a 6 you should have to cash in your 13 and take a new agreement (£40) for the 6Kg. On the other hand they will give you £7.50 each for unwanted bottles regardless of size. springy

I'm pretty sure this is a factory marine engine. springy

Something a little different - Coventry Godiva & gearbox https://www.ebay.co.uk/itm/Coventry-Diesel-Godiva-marine-engine-SCG-gearbox/173527458909?hash=item28670ae45d:g:pOwAAOSwqmdbls8N springy

IIRC the Gelcoat is a layer of the same plastic monomer & activator mix with the required pigment added which would normally be painted on the inside of a mould (after a good waxing) the fibreglass (or other reinforcing material) is then laid over this with more monomer / activator mix worked into the matting up to the desired thickness and allowed to cure. As such the gelcoat is not really a separate layer but an 'integral' part of the fibreglass structure, although if cut with a saw a transition from the pigmented gelcoat to the clearer colour of the standard unpigmented resin can be seen, I have seen gelcoat can be applied onto an existing surface (for repairs etc) but it would be the same monomer/activator/pigment mixture, getting a high gloss finish really needs a waxed mould. (All based on 20-30 year old knowledge so current materials may have changed) springy

Latest report - stoppage now extended to 6pm 13th July, things are happening on site, but the towpath closure makes pics difficult, they have now excavated the towpath and two pre formed pipe sections can be seen in the yard. springy