1956 7.5 johnson

[baconbiscut]

I have question. I just bought an old 12ft starcraft v- hull fishing boat . And my great uncle passed recently and gave me his 1956 7.5 hp johnson and i was just wondering if i could get awhale tale that would fit the outbaord

 

[tashasdaddy]

Re: 1956 7.5 johnson

why would you want to put a whale tail on a 7.5, to try to get it to plane? does this one have a remote tank or built in gas tank. i have a '55 15hp rude on a 14' alum.

 

[baconbiscut]

Re: 1956 7.5 johnson

That way I could get up on plane at a slower speed.

 

[Scaaty]

Re: 1956 7.5 johnson

Aint gonna happen..you will just add more drag. Ya need more HP

 

[tashasdaddy]

Re: 1956 7.5 johnson

put some rocks in the front. or a pretty girl that likes to fish and bait her on hook.

 

[Scaaty]

Re: 1956 7.5 johnson

Yep on the weight...set up my overweight neighbor with a 4HP on a 12 Alum row...2 bricks and the anchor has her faster than bow up and light.....

 

[baconbiscut]

Re: 1956 7.5 johnson

my 7.5 planes the boat just fine. but heres an example. my dad had an old pro-line that was 17 ft and had a 90 hp johnson it without a whale tale it would plane at 17 mph with a whale tale it would plane at 12 mph see my point i want to plane at a slower speed.

 

[tashasdaddy]

Re: 1956 7.5 johnson

try it and let us know. but i think it is going to drag there's a big diffference in hp and the boats. i think you are going to have to modify one.

 

[Chinewalker]

Re: 1956 7.5 johnson

Adding that much drag to a 7.5 will really kill your speed. You might plane at a lower speed, but your top end would drop off significantly. Plus, the cav plate on the 7.5 is quite thin - would probably break easily with the added stress.
- Scott