Check olut the size of the fuel tubing,if it is the small this does'nt feed enough fuel to the engine for high revs. for a long time,It has been my experience that sometimes hobbyshops don't realize that the tubing is made in 3 sizes. For a 35 or bigger it is best to use the large type.
Ted shuffled out of his cave and grunted these great (and sometimes not so great) words of knowledge:
Large size fuel line is (in the MAJORITY of instances) to large for the nipples on the engine. At a minimum, in order to keep the fuel line attached you will need to use fuel line clamps. In addition, the orifice (size of the opening) in the nipples is going to determine the amount of fuel allowed through to the engine.
The correct size fuel line for a 46 engine is the MEDIUM size fuel line. MOST 61 will also require a medium size fuel line.
The amount of revs you will get from the engine are determined by a number of factors.
The PRIMARY factors are:
The diameter/pitch of the prop. The smaller the diameter and the lower the pitch, the higher the engine will rev up.
The amount of nitro in the fuel. High nitro fuel (IE - 30% nitro) will provide a noticeable difference in power and rpms.
PROPER tuning of the engine.
Add to this other variables such as the altitude you are at, the temperature outside, the amount of humidity in the air, the type of glow plug being used, the amount of oil content in the fuel, whether the oil is caster, synthetic or a mix of the 2, ect.
Everything he said plus a task for you. Find a real hobby shop instead of a place that sells hobby equipment. A real hobby shop knows the industry and what has been done, what is being done, and what may be in the pipeline so to speak. The other places will get you what you tell them...
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