FS400 problem

[Paul Smith]

Hi, I'm having a problem with the 400. It runs fine then just looses revs and power. I've tried leaving the fuel tank loose and looked for leaks in the system. If I turn it off and restart its fine again!

 

Looking at a spare diagram and the only electrical item appears to be the ignition module, could this be faulty?

[BTS]

Hi, I'm having a problem with the 400. It runs fine then just looses revs and power. I've tried leaving the fuel tank loose and looked for leaks in the system. If I turn it off and restart its fine again!

 

Looking at a spare diagram and the only electrical item appears to be the ignition module, could this be faulty?

 

I had same problem with mine in the end turned out to be a very small mesh filter in carb missed it first time i had a look but once cleaned worked fine

[Paul Smith]

Thanks, is it part 28 on this diagram?

[spudulike]

The mesh strainer sounds very likely, check the fuel line isn't holed and before you write the ignition model off, try regapping it with slightly less gap - sometimes if the gap is slightly too large, they can spark when cold but go when warm.

 

Worth checking the rest of the carb over as well.

[BTS]

Yes part 28 is the bit im on about

[spudulike]

Sometimes if the carb has been left standing and dry, the gauze can look clean but actually be blocked by a transparrent residue. Worth pulling it out to check it against a bright light!

[Paul Smith]

Thank you all!👍