If it looses power after 20 mins it is probably overheating.
On older engines this is commonly due to a blocked water passage if the
impellor is OK.
The problem is you do not know if ay damage has been doe.
I would not buy, £125 seems very expensive for a 3hp which is not in good
working order.
Alec
"sunny" <tonsundermeijer.TakeThisOut@hotmail.com> wrote in message
news:42ed40ac$0$23682$dbd4b001@news.wanadoo.nl...
> An outboard motor was offered to me with a cooling problem.
> I am new to outboard motors and do not know what to look for.
> They told me that they serviced the motor and requested help from an
> engineer when they got to the tail.
> The impellor seemed to be okay.
>
> The engine looses power after approx. 20 minutes.
>
> What could be the problem?
>
> Thanks in advance,
>
> Ton
> >> Stay informed about: cooling problem evinrude 3HP