RCU Forums - View Single Post - OS .35 AX Mid Range Stagger

04-02-2010 | 11:18 AM

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DarZeelon

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From: Rosh-HaAyin, ISRAEL

RE: OS .35 AX Mid Range Stagger

Guys,

If new, there no longer is an A3 plug from OS...

Although it is virtually the same, as far as its heat-range is concerned; the nomenclature is now #6.

As far as OS is concerned, the #6 is designed for slightly smaller engines, up to .32 cid (plus the .40LA).
Running the US norm 15% nitro further stresses this (but it could be more tolerable, if you're using 5% in Thailand).

Yours seems a problem that should be solved by adjustment; rather than by component replacement.

If 'the 25-30 second idle -> full test' Barry suggested shows it is loading up, keep leaning the low-end until it does not.
If off-idle perfection causes mid-throttle fuel starvation, the fuel metering-valve might need to be modified to provide a slightly 'fatter' mid-range.

In any case, ThaiLazer, running your engine any richer than it needs to be (you are way past break-in), is not insurance and will not extend its service-life expectancy.
But it could cut short the life of your whole model, by causing the engine to conk-out when it must not...

The fuel needles are your engine's immediate ignition-timing controls, with all other criteria unchanged.
Allowing the engine to load-up at low-throttle, is just a 'fringe benefit'...

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