I've recently repowered my 300 Marlin with Suzuki 300s replacing the original Yamaha 225s.
Since the repower, I've noticed that the boat doesn't feel as stable as it did before. Now if this was at WOT I would just attribute it to the added power and speed; however I have symptoms even at 17-18 knots. Essentially any speed up on plane.
I first noticed this when I would catch a small boat's wake either from the side or riding through it from behind. The boat would list heavily side to side and the only way to regain control is to back off the throttle and come off plane. This past weekend my sister and wife riding in the back noticed the boat felt like it was moving back and forth similar to the feeling of riding in a tube being pulled by a boat as it jiggles in the boat's wake. This was both in a flat bay as well ocean with 1'-3' seas. The boat is also behaving like this regardless of load.
Essentially, the boat feels like it's riding higher out of the water then it did before, and get's disrupted more easily. Between my father and I, we've had a 20' Overnighter, 25' Sailfish, 268 Islander and now my 300 Marlin. I'm very familiar with how Grady's handle and how smooth and stable the SeaV hulls are.
I'm looking for any information on what could correct the boat's current behavior. The engine's are mounted on the second hole from the top with the anti-cavitation plates level with the hull. On plane they are not above the water, but it looks like water is just skimming over them. Currently using 3/16/8.5 props and have room to gain a few hundred RPM at the top end.
Some things I've thought about but are total guesses at this point are:
1. Raising the engines one notch. I know I'll lose drag and gain RPM, but I don't know if this will affect how the hull planes.
2. Coming down to a 17 pitch prop.
3. Does the toe need to be adjusted?
Thanks in advance for any help.
Since the repower, I've noticed that the boat doesn't feel as stable as it did before. Now if this was at WOT I would just attribute it to the added power and speed; however I have symptoms even at 17-18 knots. Essentially any speed up on plane.
I first noticed this when I would catch a small boat's wake either from the side or riding through it from behind. The boat would list heavily side to side and the only way to regain control is to back off the throttle and come off plane. This past weekend my sister and wife riding in the back noticed the boat felt like it was moving back and forth similar to the feeling of riding in a tube being pulled by a boat as it jiggles in the boat's wake. This was both in a flat bay as well ocean with 1'-3' seas. The boat is also behaving like this regardless of load.
Essentially, the boat feels like it's riding higher out of the water then it did before, and get's disrupted more easily. Between my father and I, we've had a 20' Overnighter, 25' Sailfish, 268 Islander and now my 300 Marlin. I'm very familiar with how Grady's handle and how smooth and stable the SeaV hulls are.
I'm looking for any information on what could correct the boat's current behavior. The engine's are mounted on the second hole from the top with the anti-cavitation plates level with the hull. On plane they are not above the water, but it looks like water is just skimming over them. Currently using 3/16/8.5 props and have room to gain a few hundred RPM at the top end.
Some things I've thought about but are total guesses at this point are:
1. Raising the engines one notch. I know I'll lose drag and gain RPM, but I don't know if this will affect how the hull planes.
2. Coming down to a 17 pitch prop.
3. Does the toe need to be adjusted?
Thanks in advance for any help.