Yamaha 25 hp outboard sticking throttle?

C08

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My outboard main engine has a problem with the throttle. The lever on the carb that rotates and opens to increase engine speed is to doing i.e.not returning and sometimes staying a little open. This has been causing me untold grief as the failure to reduce speed on the engine means that it sticks in gear. I have tried lubricating the shift which is inside a coil return spring without success. I suspect I will have to take the car off which looks a fiddly job. On the boat now so any bright ideas before I start dismantling it? There is a small plunger info!bed which I think must be an accelerator pump but I do not think it is that?
 

C08

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8 Feb 2013
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Blathered it in oil and amazing difference. This has caused name so much grief and a 5 minute fix.......after a couple of months sailing lost. Haporth of tar comes to mind.
 

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