"Tim+" wrote

"harryagain" wrote:
"Vir Campestris" wrote
, plotholder wrote:
Our strimmer is pumping out oil from the breather pipe has anyone got
any idea what is causing this. the oil has been changed and the level
is
correct.

I've cross-posted this to uk.d-i-y - people there will know.

I'd suspect piston rings, but ICBW. Is the compression OK? Does it
smoke
when running? Is it using oil?

It's caused by combustion gasas getting into the crankcase.
Worn piston/piston rings/cylinder bore.
Or worn valve guides.

Caused by poor design/cheap and nasty/no oil/faulty oil pump/extreme old
age.

You may well find repair uneconomic.
Benefits of having 4T engine instead of 2T (anti-pollution measure).

Where would these valve guides be in a two-stroke engine? Power to weight
ratio probably rules out four-stroke engines for strimmers although I'd be
happy to be proved wrong.


Yes Honda do use 4 stroke engines in their strimmers and brushcutters

http://powerequipment.honda.com/trimmers

and they say they can be used 360°, even upside down.

Friend has one because it is so quiet and with little vibration.
--
Regards. Bob Hobden.
Posted to this Newsgroup from the W of London, UK