Suzuki DF 90 cut out issues
I have a Suzuki DF 90 on a 5.5 m Zodiac Pro Open. It's a 2009 four stroke and has a little over 100 hours on it. Like new, but there is a problem that causes the " check engine" light to come on after a while and usually when at more than 5,000 revs or otherwise under more load. Its happened twice now. The first time I shut it down and when left for a while it started without any problem and ran with no warning lights. It let me down yesterday and just cut out. A case of drop an anchor ( luckily we had the depth so we could) and wait for 40 mins. The tell tale is pumping strongly so I don't think there is a problem with the pump /impeller. When it stops the power trim and tilt is disabled as well. When it is able to restart, it seems to run smoothly, with no warning lights. The temp light has not come on either time.
I'm in Spain at the moment and so have a degree of language barrier and whilst I've had a guy have a look at it (after the first event) it was without any computer diagnostics and when it was running fine. He said put some more oil in it, but it's fine for oil. Not much help, even though he is the only local outboard mechanic.
I'm thinking thermostat, but any suggestions would be appreciated. The second time it happened I had been out for a while and it had run perfectly for 2.5 hours or more, including waterskiing. The 10 minute blast in at about 5,500 revs triggered it.
Any suggestions much appreciated.