Re: 1985 OMC V4 - Looper or Crossflow?
Dave you have a V4 crossflow. A very good, time proven design. The 90 degree V4 loopers are (compared to a V4 cf) bigger, heavier, make a bunch more torque and are an extremely good design also. The 60 degree V4 loopers are about the same weight and size as your cf. They also make a lot of torque and have a ton of acceleration.<br /><br />There were V4 crossflows rated at 140 hp from 1977 to 1984. In 1985 the 140 cf was designated as a 115. The 1985 140 was the looper. The 120's are loopers too.<br /><br />I'm not sure that the 90 degree loopers burn more fuel per hour but since they make more torque they usually burn less fuel per trip. Obviously it depends on the set up. The 60 degree loopers definately burn less fuel than their cf counterparts.<br /><br />To answer the other gentleman's question, going from a 90 or 115 cf to a 140 cf on the same boat with the same set up is usually disapointing. The 90 thru 140 crossflow all have the same bore, stroke, intake and gear ratio. Yes, the porting is slightly different as are the carbs and heads but it takes a well designed hull to see small differences. <br /><br />However, going from any cf to a looper is like night and day. Its the torque deal again. <br /><br />We've had many V6 crossflows on my Dusky. They all ran and performed as expected. We've also had some 60 degree V6's on it. The 60 degree 150 I have now is faster, quicker, lighter, quieter and burns less fuel than any of the crossflows (150 to 200) we've had on it. It's 1940's technology vs 1990's.
