Re: Listing badly underway
I agree with stillfishing - Since the boat ran true before the rebuiild then I would stay on that track. Here are a few suggestions:<br />1) keep in mind that the prop rotates clockwise so the boat will want to lean counter-clockwise (left or to the port), and this is why the helms are most often on the right side. If the listing is due to prop torque, thenit would be to the left. <br />2) Since the list did not occure before the rebuild, my first "look see" would be the steering tab on the bottom of the cavitation plate. Even though it is to counter act the torque steer ( not listing). When this is not correctly adjusted, it could cause a listing especially when a hydrofoil is used. The hydrofoil will increase the lift progressively as the speed of the boat increases. This will cause a bow down effect and the steering tab could cause it to list even more to port. <br />3) I am assuming that you are triming the motor up once you are on plane - ????<br />4) If the tilt trim is not working or the motor does not have trim, where is the trim adjustment rod. If it is as close to the transom as possible, this is likely to be too much once on plane. It too will drive the bow down.<br /><br />5) If the hydrofoil is running below water it will influence the bow to stern attitude too much. It will lift the stern and drive the bow down. When in this position, the torque list from the prop will be pronounced and you will experience a severe listing.<br /><br />As for Smart Tabs being able to correct this type of list - Yes they will correct a fixed or permanent type list. You simply increase the lift pressure on the port side and reduce it on the starboard side. However, unless you have exhausted all of the other issues, and can not find the cause I would not use trim tabs to fixe a problem.<br /><br />Please understand that trim tabs are not a "fix it" item - even when they do fix a problem. Trim tabs provide an extension of the hull, which can be adjusted (in effect changing the hull design) to extend the hull efficiency. This effects the entire range of opperation and including fuel economy. Rigid devices such as hydrofoils will improve one aspect of the boat performance but generally deminish other aspects, simply because they can not be adjsuted to suit the next condition. If They run below water level when the boat is on plane they can and often do become a rudder. <br /><br />Hope this helps!<br /><br />John at Nauticus, Inc.
<br /><br />The leg unit has a "dol-phin" or whale tale type device on it. It appears 
