When mounting two outboards, is there a formula for ...

SeaMasterZ@aol.com

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May 21, 2003
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which side to put the larger outboard? the 33 and 40 horse are dimentionally similar, but there is that 7 horse difference ... I was thinking put the 40 horse on the side I am on<br /><br />also, do you line up the cavitation plate with the lowest part of the hull,, or go for the middle? (twin motors are on each side of the transom, where the distance to the bottom of the boat is less than at the keel, so line up at the inner edges of the cav plate level with the keel)<br /><br />thanks<br /><br />PS where is a good place to get the steering set up for a twin sixties OMC on a cable steering set up?
 

Solittle

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Apr 28, 2002
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Re: When mounting two outboards, is there a formula for ...

I think you want to start with the cavitation plates about even with the bottom of the hull even though the keel may be deeper. I assume that you havew some kind of a V hull. You can adjust from there for performance.
 

mattttt25

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Sep 29, 2002
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Re: When mounting two outboards, is there a formula for ...

ray, are you setting up twin outboards of different hp to run together? will this work? i remember a thread awhile back that said the higher hp engine will just pull the other through the water, causing lots of cavitation.<br /><br />btw, where in sj? raised there my whole life, visit the fam often.
 

dakotashooter2

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Jun 10, 2003
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Re: When mounting two outboards, is there a formula for ...

If you plan on running them togerther you would also want to opposite rotation (One clockwise ,one counterclockwise) of the motors or you will get tremendous tourque.
 

peterbo3

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Mar 8, 2003
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Re: When mounting two outboards, is there a formula for ...

Hi Ray,<br />No problem. You need to equalise the thrust from each engine. Run your larger HP at slightly lower revs.Trial & error is the way to go.Steering feedback will tell you when you are balanced. Boat will track straight.<br />Regards,<br />Peter.
 

SeaMasterZ@aol.com

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Re: When mounting two outboards, is there a formula for ...

SoLittle, yes, I am setting up two boats, one is a rounded bottom, the other is lesser pitched but still there<br /><br />mattt, Cherry Hill West here, and I think it would, they are probably equal in actual power, I can juggle the throttle to get them even, what I really want is to run them at 2/3 throttle and just cruise, should be churning out around fifty five horsepower without too much calamity<br /><br />dakota, I dont know if that applies to the lil guys, they are 18 foot boats, I dont know if they have the guff to cause torque steer - after all, the motors are SEVENTY YEARS OLD between them (I should erase that, lol, its making me nauseous! hehehe, rolmops has twin 59;s, 88 years between em :eek: )<br /><br />Thanks Peter, Ill give that a shot, I think you let one engine run free to find out where it wants to be, tthen secure it to that spot<br /><br />that new thottle should be in tomorrow, Ill be going insane for a while, lol<br /><br /> :rolleyes: :D :rolleyes:
 
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