When I try to trim out my boat at any speed the rpms and speed pickup until the av plate is about level with the keel. If I trim further than this the speed and rpms drop and the stern squats and makes a bigger wake, the propeller never ventilates through the whole trim range. It really seems like something is wrong on my setup.
The boat is a 1976 viking 160si it is a center console tri hull deckboat It is 16' and has a 1976 v4 135 with aftermarket trim n tilt on it. It currently has the stock 13 x 15 prop.
I think the motor is a little to deep. The av plate is right underneath the keel when trimmed level, I can raise the motor 3 more holes if needed. I am planing on trying to raise it.
I also think there could be more weight in the bow than other boats. The console is pretty far forward and the trolling motor and battery is in the bow and the gas tank is centrally mounted. I was also thinking it could benefit from a bow lift propeller but I am not sure. Would this be a smart thing to try?
If you could explain some of the physics of what is happening and suggest some fixes that would be great.
The boat is a 1976 viking 160si it is a center console tri hull deckboat It is 16' and has a 1976 v4 135 with aftermarket trim n tilt on it. It currently has the stock 13 x 15 prop.
I think the motor is a little to deep. The av plate is right underneath the keel when trimmed level, I can raise the motor 3 more holes if needed. I am planing on trying to raise it.
I also think there could be more weight in the bow than other boats. The console is pretty far forward and the trolling motor and battery is in the bow and the gas tank is centrally mounted. I was also thinking it could benefit from a bow lift propeller but I am not sure. Would this be a smart thing to try?
If you could explain some of the physics of what is happening and suggest some fixes that would be great.
