Smallholders Insurance from Greenlands

Author Topic: Any experience of a Howard 300 Rotavator?  (Read 4339 times)


  • Joined Nov 2015
  • Kernow. Some say it's in England !
Re: Any experience of a Howard 300 Rotavator?
« Reply #15 on: May 02, 2017, 09:38:59 pm »
cloddopper - I have only now skimmed through your most recent posts.  Thank you most kindly for all the tips/advisory comments. 
Diary bit congested right now so I have not yet started repairs:  best, I reckon, to find some good clear time to go about in an orderly fashion without distractions.
Thanks again.  Obviously I'll update idc. 


  • Joined Apr 2017
Re: Any experience of a Howard 300 Rotavator?
« Reply #16 on: May 08, 2017, 08:08:24 pm »
Have you done anything to your rotavator yet? I had mine out today for the first time since last year, started first pull  and ran perfectly, mine is a 350 with a K141 but any Kohler engine is way better than a briggs and scrapum.
Some of what Clodhopper told you is incorrect, parts are easily available there are still a couple of places that specialise in Howard rotavators and you can get head gaskets off ebay with a quick search.
The head should come off easy, I can't imagine the bolts would be corroded unless it's been left outside for a long time.
It's a side valve engine with the valves in the block so you don't have to worry about disturbing the valves and once you have the head off pull the starter cord slowly and have a look at the valve seats if they look half decent I would leave them alone as getting the valves out, reseating them, then re-setting the clearance is a lot of fiddle.
Just give the head and block faces a clean, check there are no nasty scores or major wear in the bore, stick your new gasket on and slap the head back on  :thumbsup:
The oil seals on the rotor shaft are two lip seals back to back I believe, the seals are mounted in the housings bolted to the chaincase with half a dozen little 7/16" head set pins the heads usually get worn away by the soil so may be difficult to get a grip on and you might need new ones.
The reason the seals go is because some people seem to leave string and wire lying in the ground and it gets wrapped round the rotor shaft  >:(
The 300/350 is still the best, user friendly, perfect sized rotavator ever made and if yours is restored to good nick would be worth £300+
One thing I have done with mine is convert it to electronic ignition, which does away with the points and condenser, like this one  - eBay item number: 322502880161


  • Joined Nov 2015
  • Kernow. Some say it's in England !
Re: Any experience of a Howard 300 Rotavator?
« Reply #17 on: May 25, 2017, 02:06:39 am »
Kev - obliged for your input.  Not tackled repairs yet due to daughter's temporary return from Oz - all I've managed to squeeze in over past few weeks is some unavoidable weeding of the young willow-patch and a sneaky couple days of gardening (couldn't leave clients feeling entirely un-cared for over the month of May!)  And now I have so many competing tasks begging attention on the land! 
I have new head gasket and condenser ready to install when I can (and won't be going down e-ignition route right now).  Also, might get some of the copper spray-gasket stuff, as suggested by Clophopper, if head looks just a tad uneven.  I won't order any new oil seals though until I've taken out the old ones and can see what's what.  I seem to think there might be a modified (single) oil seal to replace the original back-to-back seals, but we'll see idc.


  • Joined Nov 2015
  • Kernow. Some say it's in England !
Re: Any experience of a Howard 300 Rotavator?
« Reply #18 on: May 30, 2020, 12:52:32 am »
Time has passed and much has drawn my attention away from stripping down my Howard 300 & putting back to good working order.  But I have really really been wishing lately that Howie was in good shape.

Having actually run out of space to do a strip down myself, I finally called my bro'  ...  "Now that the Cobra is pretty much done, would you have time to get another vintage machine back to some sort of running order ?" ... "Maybe !" 
Howie is now sitting in his workshop rather than in a dusty corner of one of my ISO containers.

I think Howie is in the best of hands (check out Kernow Skunkworks on YouTube if interested in inspired mechanical manipulation/engineering for a work-over of an AC Cobra) and I'm hoping it won't be too long before my Howard 300 is ripping up the beds as he should!  I have had to tell bro' that I just want it to work again without spitting out fluids etc & that I'm not looking for a make-over and a metallic spray job.  He smiled!

I'll update idc for anyone that might possibly be interested in knowing that an old Howard 300 is once again trugging along between the rows in fine working order !  :)

« Last Edit: May 30, 2020, 12:59:53 am by arobwk »


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