Hey folks! Great you're watching again
I have been a guest at 'Dumpert'
Those guys gave me a present!
Nice!
Look at that; a kart!
It has been sitting at a supermarket
thereafter it sat in the 'Autobahn' decor
It hasn't run for quite a while
I have no idea if it will run
A simple Honda 4 stroke engine
200cc
200 GX, it's an industrial engine
It's also used on generators and pumps for example
Here's a reduction
In there's a clutch, a centrifugal clutch
It engages if you push the throttle
It's automatic
So just push the throttle or the brake
here a chain to the rear axle
a rigid axle
No differential, none
The ones who ever drove a kart will know that for sure
Let's see if it runs
I will check first if the engine is mechanically in order
I just pull the starter
Important to have the ignition turned off
I don't want it to start by accident
I don't expect that will happen..
But it could cause trouble, I haven't checked the oil yet
I pull the starter
and I feel strokes in the rope
That's the compression of the engine
That's good, it needs that. Otherwise it won't run
If you pull the starter
and you don't feel much resistance
not the strokes
Something is wrong then
Maybe a valve doesn't close, worn piston rings
No compression; the engine will not run
The engine seems mechanically OK
It has compression
it's not seized
it doesn't crack & squeak
Next thing I'm going to check if there's oil in there
I don't want it to seize in the first minute
That would be a shame
Oil filler cap and dipstick are here
Now.. it's on level
That's a suprise
They put it on its side in the studio
oil leaked out of it
and when we put it back on its wheels
even more oil came out..
But.. dipsticks says it's on level
But we have another part which contains oil
Here's the engine
Here's the reduction
With the clutch
this part also needs oil
filler cap
With a dipstick I presume
That's empty
Next thing I want to check;
If we have ignition
No spark; it won't run
Better check it first
before I'm going to tire myself by pulling this cord
Here's the cylinder head
Here's the spark cap
there's the spark plug
I'm going to take that out
Here's the spark plug
I will put it back into the spark plug cap
Now it's important this part of the spark plug
is in contact with the engine
I put it somewhere overhere
look
And then pull the starter and see what happens
Ignition on
Ignition is fine
I'm not installing the spark plug yet
I just put it in loose to prevent dirt from entering there
It will be handy later if the plug is not installed
I will get back on that later
What could be important now?
I know that these things won't run well without fuel
Let's take a look to the fuel system
Before I will fill the tank with fuel..
I will check the carburator first
Because this thing has been sitting for a while..
It's possible fuel has dried up
and has varnished
That causes dirt in the float bowl
If I fill it with fuel
that dirt will enter the carburator
and clog it
It has tiny ports like fuel jets
They can't handle dirt
It will save you a lot of work;
Check the float bowl first and clean it
Here's the air cleaner
below there we have the carburator
Under this carburator there's a reservoir
That's the float bowl
You see this; it's a dirty mess
Let's clean that first before taking it apart
That's not dirty
only a bit of oil, because it has been on its side
That's no problem
Here's the float
The float controls a needle
That's where fuel enters the float bowl
That works the same as a cistern of a toilet
If it's empty it will be filled
the float is in lower positon
fuel will enter
if it starts floating
it will shut down the fuel supply
and it's on level
It's important the needle isn't stuck
The needle can be leaking
But we will check it later if we have issues
It's a plastic float
It's possible these are punctured
Fuel will enter the float
causing it to sink
then the carburator will overflow
Overhere we have a sieve
Let's take that off too
Let's see if it clogged
It's possible
It still contains some fuel
It even doesn't smell like fuel anymore
This came from a good year
Don't do that at home
Don't blame me if you're ill
A bit of dirt collected at the bottom
Solved
Float bowl is almost clean
It's clean now
Let's reinstall those
Now the step most people start with when the have something new
Fill it with fuel
Tank is clean, that's nice
Fuel is filled
You don't want to know how many things I've repaired
just by putting proper fuel in
many engines which have been sitting for some time
have old fuel in them
Drain the fuel tank
clean the carburator
put new fuel in
100 points
especially small machines
like chainsaws are very vulnerable for old fuel
You better use fuel which has a long shelf life
instead of regular fuel from the gas station
But the engine doesn't only need fuel to run
it also needs air
so I will check the air cleaner
See if there's no birdsnest
Filter seems clean
Since I took it apart and I have the compressor here
I will clean it
Allways blow the airfilter inside out
The dirt collected on the outside
Like this
This engine has a membrane fuel pump
That's connected to the crankcase
By the movement of the piston
it will create over and under pressure
that varying pressure
will cause the membrane start moving
That membrane pumps the fuel from the tank
to the carburator
That means; if the engine is turned
it will start pumping fuel
that's why I haven't installed the sparkplug yet
It will cost less effort to pull the engine
I will crank it and pump the fuel to the carburator
Let's see if it works
It has clear fuel lines, so I can check where the fuel is
Sweet
Here's the pump
There are three connections
This one comes out of the tank
this is where the fuel enters
This one goes to the carburator, fuel exits there
This one goes to the crankcase ventilation
It takes care of that varying pressure
and gets the membrane moving
Let's see if it works
Fuel valve is open
Ignition off
Let's see what happens
No fuel is coming, it takes too much time
another solution
Let's take off the fuel line to the carburator
and suck the fuel through
Let's suck the fuel out
Glad those are clear hoses, so I can stop sucking on time
There it comes
That's better
It seems the fuel pump isn't working
I sucked the fuel through the pump
But it doesn't pump it further when I crank it
I can just blow the fuel back through the pump
It seems we have a failing check valve
There it is
This is the hose for the varying pressure
There's the membrane
That will move like this
These lips are the check valves
You can tell these aren't working anymore
this one is open
that's no good
This isn't too bad
This is because this engine has been sitting for a while
These parts dry out
If these parts are submersed in fuel
The will keep working
But when these are dry, it will go wrong
This sheet, here's the membrane,
these small lips are the check valves
They need to shut off the flow ports
They fail now, because they're pointing upward
I can solve that
I try to bend it down a bit
It might be sufficient
Put it back together and see if it works
If it doesn't;
I will submerse this part in fuel for a night
It might be more flexible in the morning
Let's see what happens
I've disconnected the pressure line
put this one on
Let's see if the pump isn't working at all
Blow & suck in order the get the membrane moving
then it should work
Fuel pump is working
It takes a lot of pressure
Let's connect it
Fuel line is connected to the carburator, lets fill it
Float bowl is full
This one there..
We have compression
We have a spark
We have fuel
We have air
It should run now
I put it on chocks
It has an automatic clutch
I don't want it to start
and takes off without me
Choke on
Fuel valve open
Ignition on
Here we go!
That was a short race!
But I was fast!
We went to a bigger testing ground
overhere we can test it better
I will test it!
Yeah, step on it!
I think I should try it too
That's for sure!
I asked myself why we never go karting anymore?
It's fun!
It's better to go karting
You don't need to fix it if you break it
Hey folks! Thanks for watching & see you next time!
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