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  1. M

    Need input on new Audio Install.

    I am looking to put a Stereo on my boat I already have a head unit, but I want to replace the speakers and install a Sub. I am looking at a 5 ch amp with 4 x 6.5" coaxials and one 10" sub. Goals are obviously loud, and as clear as possible, Budget is $700 or less. I will be using a Car...
  2. M

    1983 Merc 470, Overheat on plane.

    So I have had this boat 2 years now, got it for very cheap. Has the 4 in heat ex-changer, updated manifold/riser. Now she idles and runs slow great, the weird thing is the temp never goes above 130* at slow speeds. The issue I am running into is a slow over heat while on a plane, it takes...
  3. M

    Mark Twain Sonic 210 SF Merc 470/Alpha 1 few questions.

    Hey guys first time boat owner here and new to the forum, I have grown up on boats that my parents owned this is my first boat that I can say is mine she need a little work picked her up for 1100. Curious what the idle RPM should be? I don't have an owners manual for the boat, my tach is...
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