Quote:
Originally Posted by tkwalker
Merv demonstrated this unit to me Thursday ... It does most everything anyone would need ... The only downfall ,which I have read in reviews is the GPS Speed display ... constantly bounces speed ... And I witnessed this with Merv's ... But in Merv's case his Trolling motor maintains constant set speed ... usually from 1.5 to 1.8 MPH when trolling for Crappie or where ever he wants to set it ...
In my case I will use my Yama 4 stroke 50 HP with a trolling plate that Runs a min speed for my boat at .4 MPH on my 1000 pound Alumacraft boat base weight ... (Before the plate it's min speed was 1.5 for me to fast for trolling for EYE'S ) ... so I have to throttle up now with the plate but have all the capability of an electric trolling motor ... .. and then the only thing you hear is the water telltale discharge (the pee stream) hitting the water ...
I was going to get a 597 HD but I think I am going to do some more searching for reviews on an 800 or 900 series And also maybe Lowrance ... Merv also had what I think was a 800 series that the speed was dead fast ...
Merv ... What is the other unit ?? If you are not interested in dead nuts trolling speed ... The 597 is the way to go ...... <'TK>< 
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is his the internal unit? just asking because mine is external and never bounces at all.