john.k

Are you allowed to paint the hull in marine antifouling?.....not TBT ,obviously ,but a copper one?

There are two kinds of zinc coating.......arcspray ,which is pure metal to metal,and inorganic zinc,which is zinc powder in zinc ethyl silicate binder.....both need a steel grit blasted to white (Class 1) steel surface,or risk failure ......especially the zinc ethyl silicate will come off in sheets if something isnt right........a common cause of failure is the introduction of chloride ion.....a big risk with garnet abrasive.

I once tracked a blockage of fuel ....had the tank out twice and steam cleaned ,and all the rest you do ,several times.........finally ,just by chance I saw it when the tank was full of water .....a small piece of a nylon shirt about 1" square.....completely invisible when soaked in diesel,stuck to the tank when steam cleaning,floated away as soon a fuel was put in.........Moral of the story......tank main outlet should be through a large gauze strainer inside the tank ,removable from the top of the tank......,the strainer would have to completely enveloped in rag ,or a very heavy sludge deposit before any stoppage of the fuel .

Spec says it meets Mil-L-2104B,which was the requirement back in the 60s,so it should be ok.......New rings in worn chrome bores take a very long time to wear in,so that may be the cause of fumes.....honing chrome with a normal hone has no effect.

Not wise to use anything but a HD diesel oil in any diesel........or youll end up with stuck rings.....rather a lot of oil in a JP3 too,sort of motor Id be changing once a year ,if it needed it.

The grease and oil rocker shafts have different part nos......indicating the threads are likely different........also note ,the JP3 lists elbows for the greasers,so you can get at them

It it turns over at all ,the glow plugs will set it off.....the tips are near white hot.....I suggest a new set of plugs ,rather than mucking about one by one......most chamber engines wont start without glow or a bit of ether......warning....only a whiff of spray should be sufficient.....if its flooded with spray there is a good chance it may kick backwards and damage the starter.

Aaargh ,yeah,but ye ave missed summat....ye must tap the compass to get a true bearing.....aaaargh.