Peugeot Speedfight 4 LC 2t - Starting Issues

[efeseu]

Hi, my friend is having problems with his 2016 Peugeot Speedfight 4 liquid cooled.



About a year ago his scooter wouldn't start, so he checked and the gasket under the cylinder head had blown, so he replaced it and everything was good.

4 months ago the scooter failed to start again and he just gave up.

I took the scooter to my house to get it checked, we've ordered new gaskets (in this speedfight there are 2) and also a new piston and piston rings just in case.

The gasket was was still good, so we cleaned out the carburettor but again, this seemed fine as well. 

I took the engine apart and one piston ring was snapped a bit, but let's be honest. It could've been my fault as I'm not sure if it wasn't me who snapped it when I took the piston out of the cylinder.

Soo... I took the old piston off, put a new one on, new rings etc., put the second cylinder gasket on, put the head back together and the scooter still didn't start.





The battery was weak as we did try turning it on before and hope it would start. So I charged up the battery, it spins faster but still no luck.



I have no idea what's wrong with this.

The scooter is only 2 years old with about 8000km on the clock.

- There is spark on the spark plug
- It is getting fuel as the spark plug was a bit wet. Although I have put fuel directly to the cylinder to see if that would help but nope.

Before this happened everything was okay. He drove the scooter, turned it off and then after an hour it just wouldn't start. Before that it did have some starting issues apparently, from what he has told me and he had to kick start it sometimes.

Please help

['O'Verse]

Kind of hard to just diagnose your engine starting issues without actually being there. You know.... could be any number of things. Carb, compression, bad gas, bad coil, etc. Do a leak down test and a compression test.

[efeseu]

Jul 28, 2018 22:50:26 GMT -5 'O'Verse said:

Kind of hard to just diagnose your engine starting issues without actually being there. You know.... could be any number of things. Carb, compression, bad gas, bad coil, etc. Do a leak down test and a compression test.

Thanks, I am aware of that, just needed things which I could check.

The scooter had been stored for 3-4 months, could've the gas gone bad do you reckon? And why wouldn't the scoot start with gas left for 3-4 months in the tank? Just asking for future knowledge. I never dealt with bad gas so yeah.

Also, would there be spark if the ignition coil was gone?

[90GTVert]

3-4 months is plenty of time for gas to go bad. My first step would be to drain all of the old fuel, clean the carb, and replace the hoses and filter.

Gasoline reacts with oxygen in the atmosphere (oxidizes), some hydrocarbons can evaporate, and blends with ethanol (that is hygroscopic) can attract water. You may be able to get away with leaving fuel in your lawn mower that's built to run on poor fuels and less than ideal circumstances, but that's not usually the case for other vehicles. You may even be able to identify bad gas with a smell (varnish-like), but don't count on that. When in doubt, just replace it and check fuel system components.

[humanshield]

Agree with the above post.

For gasoline, all bets are off after about 2 weeks sitting. Even less time if it's outdoors in the rain.  Untreated gasoline begins to break down fast with moisture.  In a sealed can it can last a while untreated but it's best to use a stabilizer if storing it a while.

Drain the fuel system, clean the tank, replace all filters, check all fuel and vacuum lines, clean the carb with jet cleaning tools.

Next time, add Fuel Stabilizer ANY TIME you won't be riding it for a week or longer and protect the tank from rain. Keep the tank full to the tippy top to prevent condensation and rusting inside the tank.

I used to put my mowers away without fuel stabilizer and about every month I had to clean the friggin carburetors.
once I wised up and started making sure fuel stabilizer was in the fuel, they could sit 3 months and STILL would start 1st or 2nd pull. Weeeeeeee !!

[efeseu]

Thank you guys for your replies.

Today I've drained all the fuel, cleaned the carb once again and put fresh fuel in. Still no luck.

I've checked the fuses on the scooter and one of them was burnt out. There's like two next to each other - one going along with red wires and one going with black wires. The black one was gone (5AMP fuse), and I thought maybe it's this but still nothing. The red one was for the ignition as when I took it out, there was like no power (no lights came on dash etc) so I have no idea what the other one was for. But never mind.

Any other ideas? I would do a compression test but I have no compression tester to do so at this very moment (I'll get one off someone in the next day or so).

However, if it turns out that there's hardly any compression, I believe that it would be the crankshaft? As the piston is new and the cylinder was good when I checked it.

[geoffh]

efeseu,I,m not familiar with the peugot engine but on the Yamaha 2t it is possible to fit the piston the wrong way,just a thought.

geoff

[efeseu]

Jul 30, 2018 14:57:03 GMT -5 geoffh said:

efeseu,I,m not familiar with the peugot engine but on the Yamaha 2t it is possible to fit the piston the wrong way,just a thought.

geoff

I am 100% sure that I've fitted it correctly, with the arrow on the piston pointing towards the front wheel.