75 sceptre to cc conversion

[strick]

Not sure what you mean. Are you mounting the top of the bracket at 22 1/4" down front the top of the transom on the boat?
My main concern is that the brackets transom (back of bracket) is 25 inches tall and you are mounting a motor with a 25 inch shaft. Most brackets have a transom height that is shorter then the shaft length of the motor to allow for adjustment of the motor up or down. Your anticavitation plate will be at the same level of the bottom of the keel of the bracket at your motors lowest mounting point. If you have to move the engine up (most of us do) then your anticavitation plate will be obstructed by the bracket. The way you have your bracket constructed you you will have to place your bracket in exactly the right place because you will have no vertical adjustment of the motor once it's mounted. If you go with a 30 inch shaft motor you will have more room for vertical adjustment of the motor. The rule of thumb is that the motor needs to be raised 1" for every foot of set back however more often then not you will raise it a little higher then that.

strick

[kneedeep]

strick the bracket will be mounted at 221/4'' above the keel to the top of the swim platform that will put the top of the bracket where the motor mounts at 281/2''from the keel. all the boats i see without a bracket all have a 20,25,or30''transom so there is no way you could lower a motor on those boats. in the past i've run all my motors a little higher up off the transom, less drag. using the 1'' per foot rule would put me at 271/2'' keel to top of bracket. i'm going to try 1.5'' per foot and hope i don't need to lower it

[hermco]

What is the set back 30"?

[kneedeep]

don the setback is 26''

[strick]

I think you will be OK. It's just nice to have the vertical adjustment up or down if you need it. Most of the single engine brackets that I researched prior to making my first fiberglass bracket had a transom height of about 22 inches for a 25 inch shaft motor. A 30 inch shaft motor has a bracket with a transom height of about 28 inches. Also as Don eluded to most of brackets for the big V-6's have a set back of about 30 inches to allow for full tilt up of the engine. How wide is your flotation chamber? from the pics it looks a little on the small size. It's nice to have as much flotation as possible for a self bailing cockpit on the 23 CC. By extending the bracket back another 4 inches and widening the flotation chamber you could have gained more flotation in the stern which would have also helped you get up on plane faster when coming out if the hole so to speak.

I don't mean to sound harsh about what you should have done when you built the bracket. That's not my intent...just trying to have a friendly discussion about brackets in general. You are doing some excellent fiberglass work and I think your bracket will work out ok with the way you plan to install it. It appears you have done your homework on proper mounting location of the bracket. Keep the pics coming !


Some good reads on brackets that you may have seen already:

D&D

Bracket1

Bracket2

strick

[kneedeep]

strick, thanks for the feedback and believe me i appresiate all the hard work that you have done on your boats and the fact that you are willing to share your passion with us thru your photos & feedback. you & big shrimpn are the reason i even tried to build this bracket.some of the reasons i built the bracket the way i did are covered in the post you mention above. i did not want water hittting above the anticavation plate causing spray & more drag plus that extra 2'' in bracket transom hieght is below the water line giving me more floation & should act like a trim tab on takeoff. the tub is 19 1/4 h x 36'' w x 26 l. i mounted last night and it turn out to be 27 3/4'' above the keel of the boat to the top of the bracket. don the price you get for your bracket is worth every penny, the time spend designing a mold,building a mold,glassing the mold,money in material & time in labor next time i'll give you a call to place an order. new pics added in slideshow photobucket homepage