Transom angle changer

mtnrat

Chief Petty Officer
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Jul 29, 2006
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419
Ok. I have a 21' Double Eagle i/o. It has a volvo penta 280 DP matched to a chev 350. The issue is it cruises bow down even with the leg adjusted for the max bow up position. Two causes I can think of is that the hull has a big hook or the transom angle is such that the adjustment is not enough to get the bow up. Now for some history of the boat. It was quite the roach that had been painted with house paint, and needed a new floor, transom, and stringers, etc. I replaced the floor transom and stringers, and stripped and repainted the whole thing. Also re did the interior more fishing friendly. I did the stringers one at a time and had the boat properly supported. In making the transom I did it by layering up one piece of plywood at a time so as to maintain the curve of the transom. The boat ran bow down before the resto, so I don't think anything changed there. I am not at the boat so I haven't measured for hook. If I find hook, I guess I should fair that out. If the hull seems ok then I figure the angle betwwn the leg and the hull is to acute and is forcing the bow down. Now for my big question. Can I put in a donut shaped wedge between the transom and the transom shield that is thicker at the bottom to create a larger angle???. That would force the the bow up.
 

GA_Boater

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Are you getting full trim movement? The right amount of extension of the rams? Is the trim limit properly adjusted?
 

greenbush future

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Aug 28, 2009
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Does the boat have trim/tilt on the outboard? you should be able to adjust the outdrive to help in this situation. Pictures are really helpful too.
 

GA_Boater

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The OP has "It has a volvo penta 280 DP matched to a chev 350."
 

mtnrat

Chief Petty Officer
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Jul 29, 2006
Messages
419
No there is no power trim. Just the holes. It is on the hole closest to the transom per the volvo aquamatic manual. I was looking at it backwards. I would have to put the wider part of the wedge at the top to get the bow up.
 

jbcurt00

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Unless it operates different then other outdrives, still nope, no wedge
 

GA_Boater

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How about trying the hole furthest from the transom. Can't hurt anything, but most manual tilts with pins will tend to bury the bow with the pin closest to the transom and lift the bow as the pin is moved away from the bow. And then there is finding the happy medium by trying all the positions.
 

mtnrat

Chief Petty Officer
Joined
Jul 29, 2006
Messages
419
How about trying the hole furthest from the transom. Can't hurt anything, but most manual tilts with pins will tend to bury the bow with the pin closest to the transom and lift the bow as the pin is moved away from the bow. And then there is finding the happy medium by trying all the positions.
Yea my brother in law is out trying that right now. That is the way I see it as well.
 

Woodonglass

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Dec 29, 2009
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25,929
All I know is...You want it set so the prop is at it's highest point if you want to try and lift the bow more. If you lift the prop to high though it will cavitate and lose power;)
 
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