uncle festa

hi i have tower pro servo sg 5010 analog this come with a sevo arm pack but i need a slightly larger arm i have a futaba one it fits but a bit loose can any one tel me where i can get larger arms

thanks martin some usefull advice i will give tha a try

thanks guys i will try some of these ideas

the engine is fully exposed i thought maybe valve cleareces might be wrong but im afraid im not up on fs engines onl ever used two strokes in past

hi steve the cylinder head is exposed the engine is second hand and its turning a 14/6 apc prop many thanks

hi i have an os91fs could any one give me any clues as to why it seems to run very hot im using 10% nitro double high lube from southern model craft would i be better of using 18% nitro

all i can tell you is that it a fs series engine and im using it in 5'6" wing span mustang but it seems a little under powered im currently using a 15x6 prop but wondered if a different size could generate a bit more power

Can anyone tell me what prop size will give maximum power from a os91fs series four stroke please

Many thanks to every one for the help hope to return the favour one day

many thanks that looks like the correct one apart from the choke lever which my one does not have

many thanks ken but i already looked there and cant seem to find my engine

Hi there I have a os fs series four stroke 91 im after a manual as i bought this second hand although every thing seems to be ok if any one can tell me where i can get one many thsnks

as i dont have the instruction manual this basicly an early artf most of the building is done you just have to put it together and cover and paint this a 66" wing span model tech p51d mustang has any have one and sugest a centre of gravity many thanks

i think you have the wrong model this a 66" wingspan model tech it is quite an old kit and i do not have the insructions

Hi i have a model tech p51d mustang before i fly this model has anyone had issues with center of gravity and would a os 91 four stroke be man enough to fly this plane many thanks