There should be a number on the plastic casing towards one end. If its no good just pull it out to get the number. Maybe tape a line to it before you pull it out as it might help to pull the new one through.
I have a 2013 lund rebel XLAnd it only has a merc 4-stroke 60 hp on it.So I'm thinking mine might not be as beefy as yours.But I can take a look at it for you this weekend when I get back out to the lake.Send me a pm if you want me to take a look.Mac
Well then maybe a call to Lund with year, model, length, ID number, serial number etc. they can give the info you're looking for.