YASP - Series 90 failing to start

[gaffers]

The carb:



The bowl is full after trying to start:



The float setup, note: the pin comes down properly:



This is the pin:



And finally the float:

[Horsley-Anarak]

Float retaining pin does not look like the correct one.

It looks a little under size, but this should not stop it from running.

Running out of answers ?

H-A

P.S. Picture of float bowl, main jet should not come off with float bowl. Main jet should be screwed into carb first then float bowl screwed onto jet.

[gaffers]

Erm yes it is a temporary replacement for the pin which is at the bottom of the testing tank.

I had to replace it yesterday and it has had no effecton the operation of the float

[gaffers]

Is the crankcase leak theory a valid one? If so I'll give it a go with the WD40....

I have a working villiers carb from a 40+, if I fit it to the 90 should it work? That way I could eliminate the carb as the issue (or not)

[Horsley-Anarak]

Is the crankcase leak theory a valid one?

Could well be, post some more pictures of the engine it may narrow it down a bit.

H-A

P.S. 40+ carb fits a 3/4" stub so will not fit a 90.

[Charles uk]

All 400 series carbs have the same size inlet holes in their castings, the same 416 body was used on all the seagull models up to the Osprey.

[Horsley-Anarak]

Charles

villiers carb

H-A

[Charles uk]

Whoops sorry!

[gaffers]

Float, side on:



Float up:



The carb stamp:



Is that a 1b?

[Charles uk]

I've just found a 416 1 & mine is a pumped carb with a brass rubber tipped needle.
Can you post a pic with the float & needle removed so we can see the hole where the needle fits.

[gaffers]

The amal carb has just told me that he intends to get an agent and charge a fee, and the 40+ is sulking in the corner and will not speak to me now........

.....or have I inhaled too many petrol fumes

[Hugz]

What does YASP standfor? All I could find was Youth Alternative Sentencing Program. Though I guess EFNR's are relative youths compared to their older siblings.

[gaffers]

What does YASP standfor?

Yet Another Starting Problem

[gaffers]

Ok I am feeling a little bit sheepish that I did not notice this earlier. SWMBO demanded her bin back as it's collection day tomorrow so as i lifted the gull out and propped it up against my worktable I noticed this:



cant see it? Try a close up:



Here is where there must have been a 'blow':



Not sure if it came like this or if it has fallen off:



So I am guessing that the block and crankcase need to come apart and be cleaned before reassembly?

[Horsley-Anarak]

Is the crankcase leak theory a valid one?

Could be

I was flushing my 102 this evening, and got the 1/4" bsf spanner to tighten the cylinder to crankshaft studs.

whilst washing it with a soapy brush around the crankcase cylinder joint, the engine speed picked up.

That could be why it was a little off colour yesterday Charles.

I have had a featherweigh, that whilst underway started making wheezing noises. That was the two bolts that bolt the cylinder on had come loose. It had got so bad that it stopped.
I always carry a couple of spanners in my pocket, I tightened up the two bolts and used the engine for the rest of the weeks holiday on the Norfolk broads with no problems.

In your case Gaffers I would try a 1/4 BSF nut on the stud, tighten them all up and you may find it is all OK.

H-A