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I have a 1965 Starflight 75hp and previously a 1964 Johnson V4. In both cases the engines would drip foamy oil after use from the locations you mentioned. The one above the prop drips onto the prop and then on the ground. The oil is unburned fuel and 2 cycle oil, mostly from idling at the boat ramp ...

Update - I was able to find a 1965 75hp Evinrude with a standard gear case locally which I traded for the Johnson with the heavy duty gear case, and the boat roll problem is gone. Prop torque was the biggest problem as John predicted. The replacement engine has the smaller diameter, 10" pitch p...

John - I am very glad you are part of this board with your experiences. Can you tell from the photo if the engine mounting height looks ok? My mechanic said the shaft length is correct (20 in shaft on a transom designed for that length). Thanks again.

Rich

John - Thanks so much for the insight. It is definitely worth trying the std gearcase with the smaller dia prop. I've already checked with my outboard mechanic, and he seems to think he has what he needs to do this, and agrees it is the right thing to do regardless of whether the change solves the r...

On my Grady there were carriage bolts and then also screws going from the outer keel into the inner keel. There are several screws between each set of carriage bolts. Remove the finish from the outer keel and you should be able to find all of the screw locations to remove the putty and then the scre...

John - thanks for the info and offer to talk. The engine is being worked on, so I do not have the boat here to check on your questions. Hopefully I will have it in about a week. I did a lot of work on this hull and did not notice any twist. I am going to attempt to post a few photos that might tell ...

John - I do not know the max rpm, but I do know the engine came off of a much heavier 18ft T&T, so I tend to doubt the pitch is too much for this boat. It does lean less the higher I trim the motor. I have not tried raising the engine on the transom. Thanks for the thoughts.

Rich

Thank you all for your help. I agree that the problem is probably a combination of the hull hook and torque prop and weight distribution. The hull is very round bottomed which is not helping. The funny thing is that the handling is very predictable . She starts out level and from 20mph up it starts ...

Thanks Joe - that makes sense based on how the boat felt as I increased power. Any thoughts on how I can stabilize the boat if this is the issue? I have thought about adding smart tabs or fixed trim tabs (if I can find any), but I hesitate to throw the bow down any more with the slight bottom cuppin...

To be clearer - the 11 gallon tank on the port side of the boat was empty when the boat handled well with the previous engine. It is now full with the replacement engine and the boat rolls left.

Good point. Gas tank is 11 gallons and is on the left of this very round bottomed boat. The gas tank was empty during the test runs and we ran on a temporary 6 gallon tank in the center of the boat. The strange thing is the lean definitely gets worse and worse the faster I go, to the point where it ...

The bottom does have a minor hook. The funny thing is that I used the boat twice with a different engine prior to refinishing her over the course of a year, and I did not notice this rolling with the previous engine. The previous engine was a 1983 Johnson 70. The current engine is a 1965 Johnson 75h...

My 16ft Penn Yan (75 hp Johnson) rolls to the left at planing speeds, even when driving straight. I can manage the issue by driving slower and trimming the motor out more, but at full throttle, it rolls regardless of trim. Anyone ever experience the same handling issue?

Rich

Bill and Karl - Thank you both for your input!

Rich

Thanks Karl,

Do you think it would be unwise to leave the one screw that is at the tightest part of the bend out permanently?

Rich