On Sun, 25 Jan 2015 13:36:03 -0800, Oren wrote:

On Sun, 25 Jan 2015 13:08:49 -0800 (PST), wrote:

When i haven't used a tool in a few months and it is hard to start, i find that
Taking out the spark plug, and putting a few drops of gas in there, and replacing the
Plug, helps get it started.
The question is, can this do long term damage?
It less than 1/2 a thimble i put in.

I know too much gas could hydrolock which would be bad so
I keep it too a very small amount.

Can the gas wash the oil off the cylinder walls and cause
Excess wear? I don't see how that could happen.

Mark


I've used more than "1/2 thimble" with no harm to the engine. I've
flooded truck carbs with fuel. Its not something you do all the time.

When the plug is out, bring the piston to top-dead-center. You can
measure with a pencil, but not necessary. At TDC pressure will blow
your thumb off the plug hole (loosely held). You don't not need to be
entirely accurate on TDC, just close.

A shot glass of fuel is fine.
I'd say a shot glass is way too much for a small engine. Clearance
volume on a 208 cc engine with 7:1 compression ratio is 36.66 cc,
which is only 3/4 of a shot glass (1.5 oz shot vs 1.17 oz).

If you are talking a 400cc engine (10hp, +/-) it is still too much. -
you will drown the spark plug.

A spoonfull of gas in the plug hole is more than enough to make it
fire. I generally put about the equivalent of a thimblefull in the
INTAKE - where you are safe to put more than in the plug hole. Too
much will wash the oil off the cyls too - but you would have to do it
a lot to do serious harm.