Originally Posted by
Scooter13
Let me start this off by saying I am not mechanically inclined. I have 2005 Optimax that sat for about 5 years without running. I had the old gas taken out, filter changed and new gas put in. 2 of the plugs were pulled and looked fine. I have had the boat out 3 times since. The first time I run it each time on the water it's a dog to get up on plane. When it finally does get up it runs around 4000 rmps and about 40-45 mph. It will then pick up rpms and speed to around 5000 and low 50's but it will drop back off and pick back up on it's own. I stop and fish and the next time I go to get up on plane and every time after that it gets on plane with no issue but the rmp & speed drop and increase issue is still there. I know I am going to have to take this back to the mechanic but does anyone have any experience with this issue as to what it could be? Water pressure is running around 15 psi. I do have a hydraulic jackplate as well. I've tried a few different heights but I don't think it's a motor height issue. Any suggestions? Thanks in advance.