Hello from Denmark
i purchased an old Suffolk Demon Deluxe last year.It´s running really well.But this year oil is runing out of the hole where you put
the oil in(sorry i don´t know the technical description)
Any ideas how to solve it?
Also i would like to know if somebody could tell me from which year it is. I can´t find to much information about the demon.More for the Punch.
Greetings from Denmark
Welcome to OLMC forums.
I looks to be circa 1958. This manual may assist you:
yes i found the manual allready, thank you.But could not find anything about the oil problem.
Your oil problem.
Crankcase breather in the valve chest ( below the inlet and exhaust manifolds) gummed up
Worn piston rings and may be the cylinder bore as well
Thanks.How can i drain the oil?
Are the two other options difficult to fix?
The oil drain is in the lower sump just below the filler. Looks as though it has been fitted with an internal hexagon plug ( needs an Allen Key)
The crankcase breather is relatively easy to remove and clean, I will post some images later.
Piston and rings - complete engine strip down.
Thanks a lot for the help.
I thought so that it was the hexagon plug but my problem is that its worn out.any trick to remove it?
Solved it. It was not much oil coming out, around 100 ml.
The purpose of the breather valve is to allow air to be expelled from the crankcase when the piston descends. On the upward stroke of the piston, the valve shuts and a small negative pressure is created in the crankcase which helps to keep it oil tight.
The moving part of the valve is a small paxolin disc that "floats" in the alloy body - up to vent and down to seal.
What goes wrong. The valve can gum up with dirty oil. The disc and its seat in the valve body can wear and not seal. Turning the disc over so that the unworn face is against the body can improve things.
The valve is held in place by a spring located by the stud that holds the cover on.
Valve components, retaining spring, cap, paxolin disc, valve body and fibre sealing washer
Another excellent technical explanation by Wristpin.
Thanks a lot wristpin.I changed it now.Need to buy oil tomorrow..then i will see if the problem is fixed.
Ok was testing it today, no oil spill. Thank you.
Another question,is there a grassbox for this model?
May have has a bag to hang under the handlebars. Several similar machines did.
Any idea if it´s possible to buy one, and if, where to look for?
Worth putting a Wanted ad on this forum, otherwise keep an eye on auction sites. Not too difficult to make one especially if another OLC member has one and will post some decent profile images with measurements.
Additionally, you could consider joining the OLM Club itself. The mailed-out quarterly newsletter Grassbox will reach many more mower enthusiasts than come onto this forum, so a Wanted ad in that could bear fruit.
While looking for something else I've just come across a 19" Demon De Luxe parts list and there, right at the end of the listing is "Grass Catcher (not illustrated)" L7696
So that answers your question - there was one!
That´s good to know.I found this on ebay.It could be the fitting grass catcher.It´s on a Mark II