Onan Generator

Discussion in 'Discussion' started by Skankin_giant, May 3, 2019.

  1. Skankin_giant

    Skankin_giant Active Member


    Picked up this little Onan 62S 12V generator set.
    From what I can find it's from September 1944 so of War age.

    Sadly that's as far as I know with American gensets, I mainly deal with British military sets. Grateful for any information.

    [​IMG]IMG_20190503_161703 by Stephen Williams, on Flickr

    [​IMG]IMG_20190503_161836 by Stephen Williams, on Flickr

    [​IMG]IMG_20190503_161730 by Stephen Williams, on Flickr

    Has a stuck valve but sadly the flywheel is split. Looks like too large of Woodruff key was used.

    [​IMG]IMG_20190503_164932 by Stephen Williams, on Flickr

    Not sure how likely I'm to get one to replace it. Was only £30 and you take your chances with this sort of thing.

    Cheers, Steve
  2. Skankin_giant

    Skankin_giant Active Member

    So been doing a bit of digging and found some manuals for the range.

    Would seem the engine from the Onan 1C range and is an early example due to the bolt on inlet manifold, later units had a Zenith carburettor.
    Trying to think the best route for this, most likely it will sit in work until I leave.... might hide it on site, being an Ex-WW2 Airfield it might cause a bit of interest if/when found again..... though would be nice to get it running, 12v is quite useful.

    More photos here.

  3. air-cooled

    air-cooled Member

    That crack look very freshly done, Steve !! Do you think it would be possible to shrink a band around it to pull it back together ? or is that nice shiny surface also the cam to lift the points ?

    I had a 62S for a few years, missing the cast cowl, never did find one so it got sold for spares ..... still got the fuel tank on the shelf.

  4. Skankin_giant

    Skankin_giant Active Member

    The chap said he couldn't get around to it, it was rather cheap and the flywheel retaining screw wasn't tight at all.... don't think it was anything I did, the crack was there before I attempted to take the flywheel off, honest guv!

    [​IMG]IMG_20190503_163703 by Stephen Williams, on Flickr

    I think one could be done, but I've been offered a flywheel from America or Ireland for the cost of postage, the mad thing is Ireland is nearly as dear as it is from America (dearer on some sites)

    Freed the valve off and tested the electric start, which works, coil is giving an OK reading and the condenser is charging/discharging, though only by a couple of volts. They seem to be quite sweet runners (for a small air-cooled unit) so would be nice to get it running, don't fancy carrying it far though!
  5. air-cooled

    air-cooled Member

    Good news that you've sourced a replacement, and yes, they may look small and neat, but bloomin' heavy.

  6. nickh

    nickh Member

    That is good news Steve. Looks like this one will live to generate another day then.

  7. Skankin_giant

    Skankin_giant Active Member

    Will be on its way from the States next week, worked out about £25 for postage, the flywheel is FOC!
    air-cooled and petternut like this.

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