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  1. W

    1978 70hp 3cyl lower unit help

    my new 'project' boat doesn't have reverse and my (trusted) mechanic tells me that i need a new lower unit. he says that i could have 6-8 hours into diagnosing and replacing the part, OR i can find a lower unit and swap it over. its a 1978 70hp 700 3cyl Thunderbolt blue band. ive found a...
  2. W

    No reverse gear

    i changed the impeller last week and put everything back together and took the boat out for a spin.... almost couldnt even get out of the launch i had no reverse :facepalm: i have forward and neutral. ive read at least 20 threads about this happening to people, but none of them quite make...
  3. W

    another pitch question - i have a 12p

    i have a old 16' fiberglass runabout (closed bow) with a 70hp Mercury OB on it. i havnt even had the boat on the water yet, but i want to get a new prop as the one on there is beat up bad. it has a 12 pitch 3 blade prop on it now. i am probably going to just be cruising and towing a tube with...
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    my prop is shot!!

    I got a new boat last week; 16' fiberglass runabout with a 75 hp Merc and the prop has one chewed up cracked blade and one bent one. Its an aluminum 12P. I want a new one. Here's the twist, I've never run the boat yet. I'm having a guy come over and tune it up. I'm thinking the prop will...
  5. W

    no reverse... some guidance needed

    new boat owner here... ive been wrenching on a 1978 Mercury 70 hp 3 cyl for a few days. ive searched and there is a bunch of "no reverse" threads, but none like this. and a HAVN'T removed the lower unit, btw. i dont have reverse. forward engages fine. the control lever wont go into reverse with...
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    Linkage adjustment

    Greetings, this is my first post. ive always loved boating and i just got my first boat. i dont know much about boats, but i have been working on and restoring VW's for years... so im somewhat mechanical. i have a low hour 1978 700 Merc 70 hp w/ Thunderbolt ign in great shape. seems to run...
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