I just picked up a set of new f200 4 stroke motors, got the 4 in lines , weight is around 490, the old 2 strokes were 390. Anyone else install the 4 inline motors on a older sailfish? will the extra 200 lbs make any different on the aft sitting to low when on the mooring ?
After thinking it over, yes I weight over 200 and I load 100's of pounds of ice, drinks and food when we go fishing, I'm thinking it would be as bad a I feared, thanks for all your inputs.
you mentioned "when WE go fishing" The WEs add up in weight for adults, your ice will melt
Here is a non exact but somewhat scientific method to judge the effect of added weight.
With the boat at the dock, measure/estimate the distance from the water to the lowest scuppers.
Let's say that is 2 inches.
Now climb into the boat and stand aft. Now measure the distance from the scupper to the water again. Let's say it dropped to 1 1/2 inches.
Since you added 200 pounds of body weight and lost 1/2 inch of clearance, it is simple math to see that each extra 100 pounds sinks the hull 1/4 inch.
So since the original distance was 2 inches or 8 quarters of an inch, adding 800 pounds will bring the water line up to the scuppers.
OK, I know that the marine engineering purists will point out many problems with the accuracy of this method, and there are a lot, it still will give a ballpark estimate.
The biggest fault with this method is that it works for a flat bottomed rectangular box very well. Your hull is not even close to that shape.
Also the theory assumes that the added weight is close to centered to the center of floatation. Of course your engines aren't and your aft end fisherman aren't either. That will exaggerate the aft hull displacement
Don't forget also, the weight of fluids, like gas and fresh water. Knowing the measurement to the water before and after gassing up can also be helpful. Each gallon of gas ads 6 pounds of weight
