Thanks Jimmy
So it is that hose. Well that's progress...
Yes it's disconnected in the pic cos I pulled it off to see if it was the end fitting that was blocked, but no water from the hose. So then I tried disconnecting the hose from the engine block - still no water.
For my next trick I shall try unscrewing the nipple itself, that the hose attaches to - because I found this:
"Re: Honda 50 no water flow
disconnect water tube from the discharge nipple at the block.
remove the nipple and i will bet there will be debris plugging the oriface.
run the motor on muffs fro about 20 -30 seconds, and yes there will be water blowing every where, and i bet it will clear.
i had the same problem for years before i did this and it's worked well."
http://www.marineengine.com/boat-forum/ ... water-flow
If that doesn't work I'll be frowning a lot, as the next step I believe is to take off the thermostat and make sure water is pumping from the hole. As well as soaking everything that is likely to mean replacing the gasket. I don't have a gasket and a thermostat gasket for a 1995 Honda outboard seems tricky to find anywhere, and I guarantee is not available here in Borneo.
Bonus question! Anyone had any success with that 'liquid gasket' stuff? If so, any recommendations?
Before the boat arrived I ordered (and received) an impeller replacement kit. On the happy bright side when the boat finally did arrive I found in one of the lockers an impeller replacement kit! I'll have to compare the 2, see if they are exactly the same (I'm not sure if there were significant changes with later BF50A engines?)
I guess either way I should try and remove the lower half of the engine and replace the impeller anyway, as I have no idea how old the one in there is. The PO seems the type to service and look after everything well, but could be the opposite and they bought spares because they know it hasn't been serviced? I dunno, so guess I should change it.
I'll try changing all 3 spark plugs and the oil filter while I'm at it. I suspect this engine has just been serviced before being sold, as when I checked the oil it's so clean it's literally see-through. When I pulled the dipstick it suddenly popped out and splattered what I thought was water at first, then saw it was just very clear, clean oil. So I'm pretty sure it doesn't need a service but I guess changing the plugs, filter and impeller won't hurt. Unless I lose the woodruff key or have the wrong gaskets...
The hydraulics seem to be functioning fine, so I'm not touching that!
Did I mention on this thread that I just bought a shiny new Tohatsu 9.8 HP 2-stroke, as a kicker? It's a short-shaft which I've heard is not ideal but I'll see what I can do with it. I already have the engine, in a huge cardboard box in my living room. Still waiting for the transom mount to arrive, then I can try and figure out where exactly to mount it.
Good news - the little 12 liter fuel tank that came with it does fit nicely in the starboard locker. More good news, I see my port locker has the main engine tank and it's a fairly hefty-looking stainless steel one. Clearly not original. The gauge on the pinnacle works and said it's 3/4 full, so that's nice.
I will see what I can do with the transom mount.
I got the 9.8 partly as a spare kicker, and also to fit onto a rubber dinghy. Will take a while to arrive but I have ordered a 3.3 meter dinghy that can take up to 15 hp, so the 9.8 should be fine.
The Tohatsu is 26 kg (57lb) allegedly, putting it about 10 kg (22lb) less than the Yamaha 15 kicker on my old boat.
Cunning plan - fit it on the starboard side, taking care that the rudder can still turn fully, and hopefully with the transom mount low enough that the cavitation plate is level with the bottom of the hull when the mount is down and the engine is tilted fully down. On the inside of the hull, fit thick plastic plating, like a cutting-board type of stuff, and the biggest stainless steel washers I can find (I've ordered a pack of various sizes). Does that sound feasible?
Sorry for such a long post
An alternative plan is to figure out somewhere to put it and just mount it on the dinghy when needed, and for emergencies could tow the Mac with the dinghy? However the more I think about that plan the more I find myself thinking 'Well if mounting it on the boat somewhere it will be high and unbalanced, or filling the cabin with petrol fumes... so why not just stick it on the transom?'
Talking of the transom, I see all the gelcoat has a lot (lots n lots) of crazy-paving cracks everywhere. I hope that's just the gelcoat and the fiber is all OK
Hi Scott, you posted while I was writing this small book of a post

Yes, have identified it for sure, that is the right hose. Fingers and eyes crossed that tomorrow I'll be able to undo the nipple from the engine and everything will be good after cleaning that bit!
For your mast support, you may find that you will want or need two poles at different heights so it'll fit under the shelter but still give you the height you need to lower the mast and use the bimini under power.
Well while it's in my driveway I can, and do, just rest the mast on the hatch. Indeed I didn't know I had a mast rest until pulling the sails out from the main berth! I thought that pole was for the mast raising system but no.
I also have a weird plastic pipe, with some fittings on it? I'm pretty sure it's a 'gin pole' or whatever it's called, to push the jib out when sailing downwind? But absolutely zero idea how to set it up.