Twin F225 Throttle Cable Adjustment

fulmar

Cadet
Joined
Aug 9, 2008
Messages
9
I run twin F225s on my Regulator 26. Both motors idle evenly at 600.

Underway, the starboard motor requires more throttle than the port motor, ie starboard throttle is farther forward than port throttle by about an inch. Happens in both forward and reverse.

What is the best way to correct this?
 

cousinabe

Senior Chief Petty Officer
Joined
Nov 13, 2001
Messages
765
Re: Twin F225 Throttle Cable Adjustment

With the engines off, you can remove the engine top cowling and check the engines throttle linkage and see if they both are opening fully. If they are....then obviously the control is adjusted correctly. Have someone move them at the control......in neutral.

Chances are there is something a miss with the engine that is lagging in rpms. How long has it been this way? Is there any noticeable shaking or miss fire with this engine? Run one at time. Do they sound the same or does the one shake more then the other? Have you looked at the spark plugs? Have you changed propellers recently? How many hours are on the engines? are they running the same rpm's at WOT?

I had this problem once and it was related to a spark plug cap that had fallen off the spark plug(that cylinder wasn't firing).
 

rodbolt

Supreme Mariner
Joined
Sep 1, 2003
Messages
20,066
Re: Twin F225 Throttle Cable Adjustment

at idle check the throttle timing marks on both engines.
make sure both start at the same mark with the same cam to roller clearence.
 
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