I have a FA-100T which was donated to me recently. The engine is about 18 months old but does not appear to have the same levels of compression as my Saito 56, 180 and 220.
The bores look pristine and the valves are not leaking. I do not know if the engine has been laid up but from its external appearance it does not seem to have been used much.

Can any member throw light on this issue, which would be appreciated

Nano, when flipping a twin the drag of the other cylinder makes the engine not feel as snappy as a same sized single.

Hobsy,

Thank you for the warp speed info. It just does no feel the same as my SC160 or OS300 twins. I wonder if the rings are gooed up because the "donor" may have used castor straight instead of synth ? will give it a run this weekend and see what happens.


How lucky you people are in the U.S.A.

You have a couple of days for glow fuel to dissolve any castor out of the engine. I would fill it up the best I could and let it sit several days if it looks like it has gummed up deposits.

Many thanks BLW.

Will give it a try this weekend.

Hello; I have been very patient with my 100T, it has taken quite a lot of running to get it up to the "ususal Saito standard". I still don't trust it in a plane, one cylinder drops out at idle and doesn't restart itself. I'd think you'll have to run it some to make a proper eveluation. Castor oil flakes on unused barings, making them feel damaged when they're not. I have a new 4 star 60 arf that I thought I'd put the twin into. I'd mount it up and down, never seen that before.[img][/img]

Hi Donkey Doctor

Many thanks for the info. I primed the motor with diesel fuel (as a solvent ) and the compression has increased. What you and the other members say is correct. The motor must be gummed up because we suspect that it has been stood up with fuel (castor) inside it. Will try to get it going this weekend and will let you all know the results as soon as I have them.

Donkey.

You need to richin the low end on the cyclinder that is droping out. I would suggest starting with a full turn in of the airbleed screw on that side. Have a 180 that this solved the same issue with.

Hello Kimhoff; Rivhenn the low end of the cylinder that is dropping out, I'll give it a try, Never got a very slow idle from it either. I have nearly a gallon of 15% 4 stroke fuel through it. It sure seems to drool a lot from the right exhaust port.

Thanks for the help.