Please log in , the forum is open to guests who are now able to view most sections, feel free to become a member , you will then be able to post and reply to topics.

JAP 2S and ALCON water pump

Go down

JAP 2S and ALCON water pump Empty JAP 2S and ALCON water pump

Post by ray fisher on Mon Jan 04 2016, 18:58

I am new to this hobby but been in engineering of different sorts all my working life
I recently acquired the combination at a local steam rally (cost me £20 - the guy had 2 and said he had no idea if either ran so I paid my money and made my choice).
Turns out it wasn't seized but also no spark. Further investigations showed the mag coil was faulty and replacements are expensive (if you can get them). seeing as I seldom clear out my workshop I found a Lucas 12volt car coil and condenser along with a gel cell alarm battery so jury rigged them to the points and got a nice fat spark. The darn runs Laughing (once I altered the timing cam to the correct position to give the points opening about 20deg BTDC )

I think I have identified the engine as a 1937 JAP2S
I have found the following numbers on the crankcase

3 questions I have are
What oil goes in the sump?
Should there be a Head gasket?
Will I be OK running it on ordinary unleaded?

ray fisher
Born to be wild
Born to be wild

Posts : 48
Join date : 2016-01-04
Age : 66
Location : Northamptonshire

Back to top Go down

JAP 2S and ALCON water pump Empty Re: JAP 2S and ALCON water pump

Post by Foden on Mon Jan 04 2016, 20:44

Use SAE 30 grade oil in the sump. Some 2a/2s engine's have a steel shim headgasket and some have none, if compression is low a smear of Hylomar or similar on the head face usually seals them ok. Unleaded fuel will be fine. Enjoy your engine, I have had a few small Jap's myself and have an Alcon pumpset in pieces that I found buried in a hedge!


Too much to do, and so little time!!
Life Member
Life Member

Posts : 1130
Join date : 2009-11-04
Age : 68
Location : North Midlands

Back to top Go down

JAP 2S and ALCON water pump Empty Re: JAP 2S and ALCON water pump

Post by Woodsman on Tue Jan 05 2016, 10:08

This what we use in all our Villiers engines


Regards Paul
Tha can alus tell a Yorkshireman - but tha can't tell him much.

Posts : 917
Join date : 2014-08-24
Location : God's own county

Back to top Go down

JAP 2S and ALCON water pump Empty Re: JAP 2S and ALCON water pump

Post by Sponsored content

Sponsored content

Back to top Go down

Back to top

- Similar topics

Permissions in this forum:
You cannot reply to topics in this forum