Likes Likes:  0
Thanks Thanks:  0
HaHa HaHa:  0
Results 1 to 6 of 6

Thread: I know there is someone on here

  1. #1
    Join Date
    Feb 2007
    Posts
    29
    Post Thanks / Like

    Question I know there is someone on here


    that can tell me about a 1986 model 120 mercruiser thats in a 18 foot starcraft boat I'm looking at. I have owned probably 20 boats over the years,but never a Inboard/outboard. I want to know the good and the bad about a rig this old [looks like its been garaged its whole life] . I'm not too worried about the hull [aluminum] It's mainly the engine and the outdrive I would like to find out the info on. Do the give a lot of trouble as compared to a outboard? Less trouble? Gas comsumption? Do they have a transmision? How about the foot [Outdrive]? What do I need to look at or checkout while trying it out? Any and all info welcome.
    Thanks

  2. #2
    Join Date
    Mar 2007
    Posts
    105
    Post Thanks / Like

    Default

    I have a galaxy with the same motor. It has been reliable for me. I replace the motor mount and did not properly align the motor and wore out a coupler. That was my own fault. It is a chevy 4 cyl motor. The outdrive should be fine if you keep it sealed and lubed. Change the oil every year, new plugs, points and dist cap. They are pretty good on fuel, better than old outboards. Parts are easy and cheap to come by on ebay(don't byt the ebay starter though, it does not fit). If it was well taken care of there should not be any problems. They are good for a lot of miles in a car, so the use it gets in a boat should be a lot less. Also one problem is cracked blocks when not properly flushed out durring freezing weather. But I have heard there is no pressure and you can jb weld the block. I never had this problem but read about it. The boat was given to me and I had to rebuild the carb and put on a new starter. He said he had to replace the starter all the time bacause he left it docked without a automatic bilge and water rose to the starter. Also explains the rotten wood.

  3. #3
    Join Date
    Feb 2007
    Location
    Indian Land Sc.
    Posts
    2,412
    Post Thanks / Like

    Default

    You should check the boots that go through the transom to make sure they are not cracked I used to have a 1974 sea ray with a 120 hp. IO and it was great on fuel. A old timer told me to spray some silicone on the boots every time I put gas in her and they will last a long time.

  4. #4
    Join Date
    Oct 2006
    Posts
    832
    Post Thanks / Like

    Default

    like everyone else said,good on gas , great on power and very reliable as long as they are maintained, just keep a eye on the boots and keep the outdrive maintained and they are almost bullet proof. i take my prop off about every third or fourth trip out and check for fishing line and lube the splines. i learned this lesson the hard way when a piece of spiderwire line eat my seals out and cut a groove in the prop shaft on my mercury . ps i would drain the oil from the foot in a clear jar let stand for about a hour if there is any water in it you will know it will seperate, and hold the jar up and look at the bottom if there is any metal particles in it they will settle and you should be able to see them, if the oil is dark just shine a flashlight at the bottom. hope this helps

  5. #5
    Join Date
    Jul 2005
    Location
    SC
    Posts
    1,178
    Post Thanks / Like

    Default

    I have owned two inboard/outboards over the years. They were very reliable and very economical on gas consumption. Much better than any outboard with same horsepower. Very much like the 4 cycle outboards now. Maintenance is slightly more complicated however. Winter storage is problematic if you don't drain all the water from the engine which is difficult compared to an outboard. I winterized my inboard/outboards by draining the water from the freeze plugs located on the side of the engine. Mixed up a solution of antifreeze in five gallon bucket and used a small tube connected to a motor flusher. Running the engine in the yard allowing the flushler hose to suck the antifreeze into the block from the bucket. Having the engine warmed up before doing this allowed the engine water pump to take the antifreeze right away. Other than that the engine is just like a car engine with the same maintenance. The outdrive unit maintenance is same as outdrive on outboard.
    http://www.cabelas.com/cabelas/en/co...l&N=4887&Nty=1

  6. #6
    Join Date
    Oct 2004
    Location
    Lancaster, SC
    Posts
    785
    Post Thanks / Like

    Default

    Quote Originally Posted by bowler man
    like everyone else said,good on gas , great on power and very reliable as long as they are maintained, just keep a eye on the boots and keep the outdrive maintained and they are almost bullet proof. i take my prop off about every third or fourth trip out and check for fishing line and lube the splines. i learned this lesson the hard way when a piece of spiderwire line eat my seals out and cut a groove in the prop shaft on my mercury . ps i would drain the oil from the foot in a clear jar let stand for about a hour if there is any water in it you will know it will seperate, and hold the jar up and look at the bottom if there is any metal particles in it they will settle and you should be able to see them, if the oil is dark just shine a flashlight at the bottom. hope this helps
    That jar trick is a great idea. Thanks for sharing.
    John 21:3
    Simon Peter said to them, "I am going fishing." They said to him, "We are going with you also." They went out and immediately got into the boat, and that night they caught nothing.

    And we act like this Nightstalking thing is new.

    For some excitment, read the next verse. A special guest arrived, they filled their coolers and had a fish fry on the beach...in the morning. My kind of people.- Bowfin

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

BACK TO TOP