hi everyone new to this can any one help
i have an apache 57" need measurement transom to spark plug

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my 57 Apache is set at approx 17 inches ( 430mm to be exact) from transom. A perfect set up i don't even need trim tabs they are just cosmetic.

This will depend on your hull weight and hardware but should give you a good starting point.
Check this site in the "how to "section and will give you a heads up on balance with dowel rollers

Hope this helps

as you mite have guessed this is my first build what is balance with dowel rollers any help is very much appreciated
thanks andy

At the top of this page you will see MAGAZINE run your mouse pointer over it and you will see a list of helpfull articles scroll down to TECH ARTICLES and click on it and then scroll down to an article called PROPER BALANCE. there is an abundance of info on this site and wether your new or old a good resource