Strimmer carburettor

[Fredxxx]

I had discounted a puncture "new" diaphragm! I don't recall Adrian saying where the fuel was coming out of the carb, BICBW.

[Adrian]

After yesterday morning, I'm bored with taking it apart, putting it back together, and finding it's no better. I think it's getting trained.

[Adrian]

Because it was difficult to be certain - it was getting very wet, very quickly. The venturi was filling up, and it was dripping off the outside of the body.

[Adrian]

Half a mile from Wales.

If I CBA, I'd borrow one from a neighbour, but...

[The Natural Philosopher]

Umm. One of the PRIMARY reasons a small 2-stroke wont run, is that te tank breather is blocked. So a vacuum builds up and no fuel glows. Or you fill it with fuel, it warms up and floods the carburettor....

[T i m]

I'd say the primary reason, if there is such a thing is a fouled plug (but even that is rare with today's 2/ oils and low oil burn. Even my old British Seagull outboard motor rarely had a fouled plug and that ran on a 2/ mix of 10:1!. That *could* suffer with a blocked or open air vent because it was a manual thing on top of the fuel cap and was easy to forget (when it would either die after a while after running a fair while or flood the back of the car / boat with petrol)).

Still unlikely in Adrian's case and certainly not 'primary'.

Again, unlikely. If it were I'd be aware of it with the 20 or so small

2/s I am involved with regularly and I can say that I've never come across a blocked tank vent. Not saying it can't happen, just that it's not the 'primary reason' a 2/ wouldn't *start* or *run*, especially straight away or one that has just been partially stripped.

Not in my 50 years of using 2/'s pretty regularly anyway.

Cheers, T i m

[cl]

Along with lots of other reasons in my experience. In particular the

2-stroke strimmer I had was as good as impossible to restart when hot, you had to take a rest, do something else for ten minutes and then it started without any problem.

However I now have a 4-stroke strimmer and there's no way I would ever have a 2-stroke one again. OK, it's a *cheap* 4-stroke (Ryobi) but it just starts when I want it to start, I can stop it and restart it as I need, it's *so* much better than a 2-stroke.

[T i m]

What if you were a tree surgeon and needed a 'top handle' saw, do they make a 4/ as light and powerful as any 2/ do you know?

Funny, that's just as our daughter uses all her 2/ tools (strimmers, saws, blowers etc) all day long . Same as my experience with my 2/ mopeds (Honda Express, NSU Quickly), scooters (Lambretta LD150 / SX150) motorcycles (MZ's) and outboard motors (British Seagull and Yamaha ... that often started first (or second) pull after being laid up all season). Even my Messerschmitt KR200 (Sachs 200cc 2/) started on the first turn of the key (forwards or backwards ). If they didn't start quickly there was probably something wrong with them. ;-(

Maybe you just had a badun there Chris?

And to be fair, most (decent sized) strimmers are used with a harness so you wouldn't be holding the dead weight with your arms. Not the same with a chainsaw or hedge trimmer though.

Cheers, T i m

[cl]

Yes, I know not all 2-strokes are the same. However the difference between a Ryobi 2-stroke and a Ryobi 4-stroke was considerable. The

4-stroke is almost exactly the same weight as the same powered 2-stroke.

It's also handy not having to mix fuel in the oil.

[T i m]

;-)

Ok.

That's true ... and they are (therefore) less polluting etc, unless you let it go upside down possibly? [1]

I wonder if the likes of Stilh will go 4/ (from their 2/ or '4 Mix') before they go (only) electric?

Still less to go wrong with a 2/ ... no valves to drop into the cylinder and write the engine off ... mind you, you can do that just as easily by not adding the 2/ oil to the fuel on a 2/.

Cheers, T i m

[1] That's an issue with 4/ outboards. With a 2/ outboard you can pretty well put it anywhere you like. With the 4/'s you can (typically) only lay them on one side because of the 'wet sump'.

[Adrian]

And the new carb...

...works like a bloody dream.

First pull, a little bit of mix and throttle-stop twiddling, and it's running as sweet as new.

[The Natural Philosopher]

Well that's a result then.