We've had a DF90 since the launch of the lean burn 1500cc model nearly 3 years ago. So far, so good...just routine annual servicing and a precautionary water pump impellor change recently. Over 1000 miles/100 hours on it now @ 8mpg (can do litres and nm too if you like but not from memory :-) ...it's fitted to an RC5.3 and pulls 43mph at 6000rpm Quiet too...Chose it over the DF100 for the 30kg weight save and better fuel consumption
I had one of the earlier DF90's on a 5.8m rib. It performed faultlessly except for an unexplained overheat on one occasion. I never found the real cause but suspect a dodgy impellor, as although the impellor looked fine I changed it as a precaution and the problem never came back. As Leapy says, quiet and frugal. Sensitive to spark plugs though I've been told.
Super engine have one to and a friend of mine has one for 2 year now and were very pleased with it.
Qaution however please use seawothy grease for the steering pin and rinse it with fresh water. (grease it regularly!!!!) but no probs.
Really a great engine quiet fast and a fuel saver.
I'll put it on my Ribcraft 5.0m , the max allowed HP is 90 , and the max engine weight is 158kg , so the suzuki is the best appropritate engine.
The weight of the 80 HP yamaha is about 178 kg , and I've tested it with some additional weight at the back, but that would be too much, so I think the 90 will be perfect.
Thats the disadvantage of the four - stroke generations , it is quit heavy. but however the etec evinrude 2stoke has an engine weight of 152 kg.
Quiet too...Chose it over the DF100 for the 30kg weight save and better fuel consumption
