Well, it didn't take long for a problem to occur
We recently purchased a Ribtec 585 with a Suzuki DF140 motor.
We launched (for the first time!) at Mudeford on Saturday. Lovely weather in the morning, and the sea was very calm. It took a while to start, but it seemed to work much better once I'd plugged the kill-switch in
Our first impressions were that the engine was very quiet and the sea was too flat for any real hull testing
But for some reason it wouldn't rev past 5000. It felt fine and picked up very nicely at every speed under 5000. I thought it might have been throttle cable slipping somehow, and didn't worry too much more about it. After that however, every time we depowered and repowered, the maximum revs achieved dropped by about 500rpm a time! It felt very much like a slipping cable, so we turned back straight away. By the time we were back at Christchurch she was only revving to 2000rpm - we couldn't even got up on a plane! Intererestingly, if I increased the throttle quickly, it would cut straight down, but I was able to tease the revs up by moving the throttle very gently - this all pointed to a slipping cable.
When we got it home, I connected the flush muffs and it revved just fine - but then it wasn't under any load. I found the throttle under the hood and it looks like the controls *were* in fact fully opening the throttle. Either that, or somehow it had started working again on the way home.
No engine faults showed up at any point. If it was a fuel supply problem, I'm guessing the lambda sensor would read lean and throw up a fault?
Any ideas what might cause this? I'm going to get on the phone tomorrow, as it should still be under warranty - but the original supplying dealer is hundreds of miles away, it if it's something obvious I'd like to have a crack at it myself!