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  Kicker Engine Causes Boat to List

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Author Topic:   Kicker Engine Causes Boat to List
fester posted 05-20-2002 01:19 PM ET (US)   Profile for fester   Send Email to fester  
I have a 15 horsepower yamaha mounted to the starboard side of the transom next to my main engine. I have a 1978 20' Outrage. The motor is bolted to the transom and weighs approximately 120 pounds. When traveling on a plane the boat, lists to the starboard side. Batteries for the boat are located in the console. Is there anything I can do short of installing trim tabs that will get rid of the list. If I relocate the motor to the port side, will this help due to the rotation of the prop on my main motor? If so, how much? I been thinking about putting my two batteries in the motor well on the port side of the boat to even out the weight. How much do you think this will help? I appreciate your input.
Thanks, Jeff
fester posted 05-20-2002 01:50 PM ET (US)     Profile for fester  Send Email to fester     
I misspoke in the above post. The kicker engine is currently mounted on the port side of the boat and the bost lists to the port side when on a plane. Sorry about the error.
Jeff
lhg posted 05-20-2002 02:00 PM ET (US)     Profile for lhg    
Fester, you are double compounding the problem. Normal prop torque from a single engine will cause the boat to list to port in the first place. Then, putting the pony motor weight on that side makes it worse. An auxiliary engine should always be mounted on the starboard side, as should the battery, which is exactly the reason why Whaler does it.

This is also the reason why traditional boats have the steering station on the opposite side, English style. The weight of the operator on the starboard side helps level the boat while underway. This is one situation where the center console boat does not work as well.

dburton posted 05-20-2002 05:08 PM ET (US)     Profile for dburton  Send Email to dburton     
Fester,

I have 1986 18-Outrage. It also has a 15hp kicker mounted on the port side. I don’t think that it is unusual. The original dealer for my boat installed it that way and I have seen others rigged the same. My boat also lists while on plane. However, my starter battery is in the stern on the starboard side as is the oil reservoir for the VRO. . I can almost always balance my load by moving gear and or people. The only time this doesn’t work is when I’m by myself.

My advise is to either do nothing or to move your starting battery back to the starboard stern. I don’t believe the listing is hurting anything other than your top speed. I know that it is annoying but I don’t think it is worth spending much money to fix.

Doug

fester posted 05-22-2002 12:07 AM ET (US)     Profile for fester  Send Email to fester     
Larry and Doug,
Thanks for the input. Larry, do you think if I move the engine to starboard side of the boat this will cure the list or will it now list to the starboard side the same amount it currently lists to the port. I am not too excited about moving the engine to the starboard side unless it will make a significant difference. What do you think?
Thanks, Jeff
lhg posted 05-28-2002 07:14 PM ET (US)     Profile for lhg    
Putting the weight of the pony motor on the starboard side should counter, and cure, the list created by the prop torque while underway. At rest, or going slow, the boat will probably list to starboard. I would consider making the change.

See the photos of the 22' Guardian in Cetacea. I believe this boat was rigged by the Whaler CPD factory.

boland posted 05-29-2002 08:01 AM ET (US)     Profile for boland  Send Email to boland     
For your comparison;
I have an 82 V-20 with a 15 hp Yamaha kicker mounted on the starboard. The primary is a 175hp Yamaha and both batteries are in the well, one on each side. The boat sits level in the water, runs level at any speed and doesn't seem to list no matter the number of fisherman aboard. There is however a fair amount of additional weight with four electric downriggers; two mounted on a platform above the engine and one mounted on each gunnel. The 40 lbs of cannonballs also sit on the downrigger platform.
cb
fester posted 05-30-2002 01:05 AM ET (US)     Profile for fester  Send Email to fester     
Last week moved the kicker from the port to the starboard side. Took the boat out last weekend and the list was gone. I was afraid boat would list to the starboard, but this is not the case. The boat runs level at any all speeds. Thanks for the help.
Jeff

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