and that is the spark plug area...
there we have one of the valves... that is the petrol mix intake valve
and that looks pretty clean on the underside there...
okay: that's not good enough is that there's the exhaust area
so
see if i can improve that a bit somehow we'll try the brush again
]music] do do do wah...
do wop a do do
la la la, do do do wop
okay this engine has been uh... playing up very recently. it's uh it's time to take
the head apart because i think the head is totally gunked up, and needs to be cleaned
i'm going to wash it in solvent probably just petrol
that's it! head is off - so let's have a look at the inside of this head - curious to see: ah...
so...!
uh yeah that's...[laughs in disbelief]
for goodness sakes look at look you can barely see... there's a valve:
there's a valve... and somewhere in there... i think under there... is where the spark
plug goes. so that no wonder it's not working i mean for goodness sakes
that is just: WOW.
so that - Jeez! - that needs a thorough cleanup doesn't it
uh we're gonna have a look at the top of the engine there
okay we might as well take that [cylinder liner] out and clean it as well i think
yeah um it's pretty nice [construction] isn't it you know it's um...
...oh! goodness me. the top of the piston: just as disgusting...
can you see that? that is just epically bad so... oh! dear oh dear... so i've got to give that a wash as well
um smell is quite you know oily sooty [burnt]
better be careful of this washer here, i don't think that needs to go up any particular way
i wonder if i can detect which way up it goes
okay. yeah that is, that is... i mean they're tiny they're...you know that's, that - that's
smaller than i thought that... that one cc uh head. it is really small isn't it?
my goodness me... that poor spark plug no wonder it's not running anymore
right that needs a really good wash. that's pretty much um the main bit that needs a wash - i suppose
i should do the top of that piston but i don't want that gunk getting down into the engine so
that is the spark plug area pretty weird - don't you think? i wonder if opening that up would help a bit
you get a feeling it might... uh... and then we have one of the valves that is the petrol mix intake valve
and that looks pretty clean on the underside there
okay that's not good enough is it...there's the exhaust area
so
see if i can improve that a bit somehow we'll try the brush again
i don't think it's actually getting in there
maybe it'll just wash through
yeah i mean i think we need to look... i need to look for a brush that will fit in there so excuse
me a minute i've just made a comment on one of my videos that i fear that these engines are
a little too small, really...[at 1.6cc]
you know three cc's or something is better. i really find that a [spark plug] hole a bit weird there and um
that hole for the spark plug and i really wonder if um (actually we
should be cleaning the spark plug and the exhaust pipe) i really wonder if
that [spark plug hole] would be better drilled out i mean it works; you know but...
that's weird, isn't it? having a tiny little hole like that? [for] the spark plug spark... intake...
and... right how are we going in there... that is better that is better
what we might do is squirt - squirt it with our friendly neighborhood uh syringe where are you syrn-
-actually this will do. this will do nicely. yes it will... so, suck up some petrol with this
look i'm splashing petrol everywhere which is... hideous. let me try and
goodness me the smell in here you wouldn't believe and this is uh Mrs Wife's kitchen so yeah
probably not ideal to... you know, probably should have been doing this in the garage but look it
could be less ideal i could be doing this with a cigarette hanging out the end of my mouth
it would all be going up in smoke wouldn't it... right that's a that's a clean cylinder liner
and we have our clean cylinder head
we still need to do this little um spark plug that keeps getting [gunked]
poor wee thing... i mean it was - it - really was no trouble to take that engine apart i guess... would
it take a minute? oh god look at that mess. right so we're gonna get some clean petrol soaked cloth
we're finally going to be able to figure out whether top dead
center is where we think it is too okay let's have a look down there
okay i've recently cleaned the whole head of this so we're just going to add a drop
of very very light oil to the inlet valve stem: so i get just a tiny drop out of there
okay because we don't you know that's got to pop down so
lightly we don't want to use a thick oil in there
other tweaks we've done recently include building up the
the part in there that holds the valve up so that part's been built up with
uh let's see if i can zoom in
it's been built up with a little bit of good fine [sheet stainless] steel of good quality steel
and you'll find that that stops the valve wiggling [up and down] all over the place when it doesn't need to
so we're going to fill it up with petrol clean the spark plug first because it always likes to
be cleaned before we run the engine: i couldn't believe that the spark plug was hiding down
a wee hole and it's very tempting to drill out that hole a bit but you know... one would
hope that the makers of this engine knew what they were doing, and uh so... i'm not gonna do that...
the engine's running really well at the moment so better not tempt fate by doing
something i can't reverse you know? this is no longer bouncing up and down crazily
you can clearly see the little bit of metal i put on that to hold that up slightly more
now i could run it slower as you see
if i run it a lot slower it may not successfully suck all the
petrol through there so i'm not sure whether i want to run it that slowly
i mean that's amazing for such a small engine and for such a small flywheel
i'm tempted to build something that will do that for me do that
and look i actually found in my garage i think the smallest g-clamp in the universe look at
that it's actually quite strongly built and i don't know how old it is it seems
to have nickel plating on it it's just starting to fail around the edges but um
if i could use that
to do what i've just been doing here with the tweezers
in the middle of this in the middle of the spring move it up
is that without the spring at all!? that's without the spring [pressure] at all! i believe not even holding it [down]
and if i hold the spring down tighter
yeah [unclear] runs a little bit faster so yeah interesting um
that's slow enough for me and the engine runs really nicely but look it is lovely isn't it
i really am in two minds about that
hmm beautiful. beautiful engine, running really nicely :)
you