beta website lists the weight as equal between the 38 and the 35. As I recall the base engine is identical. I am pleased with the engine but there were issues I had to get staight since they sent the engine with twin belts and It was ordered with single wide belt to power both alternators. We looked at Volvo, Yanmar and Beta and our Volvo guy for our old engine told me any of the three was light years ahead of our old Volvo.