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"James A Barone" wrote in message
news:ghXN5.22775$xJ4.1198177@bgtnsc06-news.ops.worldnet.att.net...
> OK all you engine folks. Subject: 503 SCDI w/B-box and 3-blade ivo prop.
70
> hours SMOH by very reputable dealer.
>
> Problem: Engine runs fine when cold. Accelerates right up to max rpm when
> throttle is opened fully. After it gets warm, engine will not accelerate
> past half throttle if throttle is opened suddenly. throttle must be backed
> off to half and slowly opened . then the engine will accelerate, but still
> not to full rpm (lacks about 300 rpm).
>
> Have checked everything I can think of. Fuel, air, and ignition. All
appear
> to be OK. Tried using choke when engine wouldnt accelerate, but eng
> immediately bogged. Plugs are new and gapped at .016. Nothing seems to
work.
>
> HELP PLEASE
>
> Jim B
>



Try cleaning the air cleaner.

Jay

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