[andyfrost]

Peter , a couple of things…….. Firstly glad you have joined us and a warm welcome.
Secondly , looking at your first photo , it appears someone in the past has had the cylinder head off and put it back incorrectly , the cooling fins should be the opposite to what’s in the picture , in order for the air to run through them, I hope I’m making sense and that you can see what I mean.

Andy.

[andyfrost]

Spot on Geoff , you have a better way with words than me.

[andyfrost]

You have a JAP80 , in image three you will see three threaded holes , you will need to make up a puller using these three holes , on no account try to remove it using a puller on the outside edge of the flywheel , as you run a great risk of splitting the flywheel.It’s on a taper , and once you have made a suitable puller , it should pop off realtively easily.

Andy.

[andyfrost]

Surely there are two jets , one for high revs and one for low ?? , seems to me the jets are not balanced correctly.

Andy.

[andyfrost]

Yes getting them running as well as can be sounds fine. I’m well aware you are a great distance from me(I’m in Norfolk) , but on older machines some clumsy courier is the last thing you want. If it is at all possible to bring them to me , I can certainly help.

Andy.

[andyfrost]

Yes getting them running as well as can be sounds fine. I’m well aware you are a great distance from me(I’m in Norfolk) , but on older machines some clumsy courier is the last thing you want. If it is at all possible to bring them to me , I can certainly help.

Andy.

[andyfrost]

Do you have any idea what is wrong with them , take in mind parts thesedays are becoming very expensive, with that in mind my suggestion would be just getting them into reasonable running order.

Andy.

[andyfrost]

Whereabouts are you based.

Andy.

[andyfrost]

Andrew Hall is your man to tell you.

Andy.

[andyfrost]

My problem was just the opposite , it was running too rich , I toyed with the float level for ages , then downsized the jet and it now runs like a clock.
Does yours improve with a little choke applied.

Andy.

[andyfrost]

Regarding the rich issue , did you get any handbooks with it that explain different fuel jets for varying conditions. The reason I ask is I’ve just had similar issues with a very early Honda engine , changing the main jet from 85 down to 80 has cured the problem.

Andy.

[andyfrost]

Those rotors are perfectly serviceable , I use a vintage Honda f50 , and simply overlap the pass each time , that way you will cover all the ground. As Chris states , the outer discs are really “crop protection” discs.

Andy.

[andyfrost]

Some clear and precise photos would really help.

Andy

[andyfrost]

Alan Newbould is really the man to answer this. It’s only my guess that a Brinly plough is the one. I have one for my Bolens 853 , and Wheelhorse also used Brinlys.

Andy.

• This reply was modified 2 years, 4 months ago by andyfrost.

[andyfrost]

All centre drive rotavators have to miss a small strip in the middle , I use Hondas quite alot , and I simply overlap each pass , that way your’re covering all the land.

Andy.

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