The 3 pnt. lift on my 1510 moves very slow, I have tried to adjust the valve under the seat but it is stuck. Is this the correct valve for adjustment? Where can I get a replacement? What can I expect to pay?
How often should motor oil be changed? What is the best grade and weight of oil to use? I have a Yanmar 1510, Is there a U.S. equivlent oil filter for this model?