What is strange is it has never done that before. I think it has something to do with the balance, bothe horizontal and lateral. Actually it tipped to the side the engine is mounted on. THe engine is side mounted. You think over 1-1/2 pounds of engine leaning on one side would effect it. Anway, when i had my fl 70 4c in it it never did that, i also had the balance right on at 130. I am thinking that if i balanced it at the moment it would be between 125-127mm. To nose heavy IMO.