35 Johnson power.

[donaldmouse]

I have a 79 35hp on a 14ft Carolina skiff.One person planes great 2 people not gonna do it.do I need a bigger motor.Sounds like its doing all it can.I put a fin on it ran seafoam through last 2 tanks new plugs. I have read weight distribution.the boat is dry no extra weight.its a clamp on moto.have motor lock in bottom hole moved it up and down,nothing.prop bushing is good.if I move the motor back away from ransom 4 inches do you think it will help.That's all the room I have.Long shaft motor.Does this make a difference. I'm lost.Thanks for any and all suggestions.

 

[JB]

Re: 35 Johnson power.

35 HP ought to run that 14' Skiff away. Sounds to me like mismatched rigging, prop, or some other thing.

What is rpm at WOT?
What is transom height?
What is AV plate height?

 

[donaldmouse]

Re: 35 Johnson power.

Going to check rpm at wot tonight ransom height20 inchesdon't know too much about it any tip on the AV plate and where to measure to and from.

 

[kfa4303]

Re: 35 Johnson power.

35 HP ought to run that 14' Skiff away. Sounds to me like mismatched rigging, prop, or some other thing.

What is rpm at WOT?
What is transom height?
What is AV plate height?

+1. That little Carolina Skiff should fly with that 35hp on the back. The anti-vent plate is located just above the prop and should be level, or slightly higher than the keel (bottom) of the boat. Most folks also find that the 2-3 tilt pin position, away from the transom, works best as well. Are you sure you're running on both cylinders? These old motors can work surprisingly well on only one can.

 

[donaldmouse]

Re: 35 Johnson power.

22inches on AV plate to transom. 2inches below the bottom of hull

 

[donaldmouse]

Re: 35 Johnson power.

Can I check wot rpm on earmuffs or do I need to put it in the lake.

 

[F_R]

Re: 35 Johnson power.

No, you absolutely CAN NOT check it wot on muffs. Don't even think about it. It might explode if you try.

 

[donaldmouse]

Re: 35 Johnson power.

I thought about that as soon as I hit the reply button.What was I thinking even posting it.Thanks though for the warning and reminder.

 

[JB]

Re: 35 Johnson power.

22inches on AV plate to transom. 2inches below the bottom of hull

Move it up three inches. Start from there and trial and error. Same thing with trim.

 

[bonzoscott]

Re: 35 Johnson power.

What is the weight of the skiff? I'm guessing it's a fiberglass boat. What is the max HP on the ID plate. I'm thinking that boat needs a fifty.

 

[donaldmouse]

Re: 35 Johnson power.

What is the weight of the skiff? I'm guessing it's a fiberglass boat. What is the max HP on the ID plate. I'm thinking that boat needs a fifty.

Bare hull420 with the fiberglass deck 520lbs don't know the weight of the motor.added livewell 10 gallon so another hundred so around 7 not counting motor weight.me and my son are 400 lbs together. It max rating is 30 hp.

 

[donaldmouse]

Re: 35 Johnson power.

The motor wing clamps are at the top of transom.I can raise it 3" but will take some modification.Will use cut wood to try if it works I can fiberglass in.

 

[donaldmouse]

Re: 35 Johnson power.

www.dillon-racing.com Jack plate design for the DIY.

 

[donaldmouse]

Re: 35 Johnson power.

Ok built my own Jack plate.Turned out real nice.I raised it 3 inches used stainless tubing 1and a half inch.Trying it tomorrow put the AV plate slightly above the bottom of transom.Result tomorrow afternoon.plus pics of the plate.

 

[donaldmouse]

Re: 35 Johnson power.



this is the jack plate I built.the 3 inch raise was the trick.On plane in 14 seconds.Not bad for a 35hp.Thanks for the suggestion.I had no idea until the post.Thanks again jb, f-r,kfa4303,and bonzoScott.Many a good catch to you all.
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