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  1. jcupo6

    Engine block change

    I have two motors, a 1979-1982 120hp merc, and a 1973 140hp merc with a cracked block. Can I use the 120hp block on the 140 hp head? Sorry if this is a dumb question, I tried to seach the forum, but could find an answer.
  2. jcupo6

    Need prop change

    I recently changed motors. The boat had a 140hp mercruiser with a cracked block. I replaced it with a 120hp merc but kept the same prop, couldn't afford to purchase a new one at the time. I'm ready now! 1. Looking for a good overall prop to gain some speed and rpms. I mainly use the boat for...
  3. jcupo6

    Engine Sputter at 1,500 RPM's

    Okay fellas I need some opinions. My 1978-1982 120 HP Mercruiser has acceleration issue. If I accelerate quickly the engine will sputter and sometimes stall at 1,500 rpm. If I baby the throttle and get passed 1500, I can then gun the motor to WOT and everything is fine. The following is what I...
  4. jcupo6

    Ignition Issue?

    I am running a 1973 Mercruiser 120hp motor in a '22 aluminum Starcraft holiday. At WOT I top out at 30mph at 3000rpm with an average load (full tank and two passengers). I read that I should be at around 4400-4800rpm and figured it was a prop issue. Last time out there were three separate...
  5. jcupo6

    Help me guess wave height

    Went out on the Delaware bay this weekend and were met with some choppy water. My buddy got a little seasick so we had to cut the day short. He seems to think the waves were 4-6' while I think they were more like 2-3'. What do you guys think? We're in my 22' Starcraft Holiday in about 15' of...
  6. jcupo6

    Merc Control Change

    I'm about to change out my controls. I've got a 1973 120hp merc. Currently the boat has a single lever throttle control which I hate! I Picked up a beautiful dual lever Merc throttle at a garage sale for next to nothing, so I am wondering if this will be a fairly straight forward swap, or will I...
  7. jcupo6

    This may be an issue...

    I was finally able to take the boat out with the newly purchased used 120hp Mercuiser out this weekend. It ran great in the driveway with no issues. Launched the boat and notice a slow drip from the exhaust manifold, was concerned but we decided to go anyway while keeping a close eye on it. Got...
  8. jcupo6

    New drive, should I replace water pump?

    I bought a brand new SEI outdrive last September and only had the boat out twice after installation. Would it be best to replace the pump now, or should I wait and replace after a couple trips into the season? I was planning on just replacing it now, but was told by a friend it would be a waste.
  9. jcupo6

    Drain Plug - Inside or Out?

    Okay, this may be a dumb question or one that has been answered many times in the past....but is it okay for me to put the drain plug in from the outside of the boat? I have had three other boats in the past, and it was easy to put the plug in from the inside, but this Holiday that I have now is...
  10. jcupo6

    Dog house ideas needed

    Spring is just around the corner and I need some ideas to fix my dog house and rear seats, which are trashed. I am looking for something fairly inexpensive, or something that I could build myself. The boat will be used primarily for fishing. I have a gas tank on one side and a battery box on the...
  11. jcupo6

    Prepping for paint

    I am going to paint my Aluminum Starcraft, but I need some advice. The are only a few very small bare aluminum spots on the boat, where the snaps for the old cover use to connect to. I am going to use Rustoleum paint. I'm not looking for perfection, I just want it to look better then it does...
  12. jcupo6

    22' Holiday Restore

    I wish I would have started my thread in the Starcraft Forum, but I will keep you updated. Is there anyway to move my original thread to here? Finally picked up the new motor. It's a 120, so I lost 20hp, but I can live with that. I got the motor which was rebuilt and I was told has no hours on...
  13. jcupo6

    22' Holiday Kicker Motor

    I have been working on my holiday for a while now, the link to my restoration page is in my signature, and am thinking about getting a kicker motor. I wanted to get some opinions. Do you think a 9.9 hp would be powerful enough? I don't want to add too much weight, but I want something that can...
  14. jcupo6

    Bad Exhaust Manifold

    I have a 1973 mercruiser 3.0 140hp engine. Water is in my oil. There was a little bit of water in cylinder #4. Change the head gasket, didn't seen any obvious cracks in the head. Compression is 1-130, 2-130, 4-130, 4-120 is this average? Seemed to have less water in the oil with the thermostat...
  15. jcupo6

    Grey motor oil

    I have a 1973 Mercruiser 140 hp 3.0L motor. We just took her out this weekend for the first time. While we were out we checked the oil and noticed that was grey. We ran the boat for about 4 hours before we noticed the oil. The motor ran and sounded great, better than I anticipated actually. We...
  16. jcupo6

    Power Trim Question

    I'm sure this is not the best place to post this, but maybe someone can help out. I have a 1973 Starcraft Holiday with a Mercruiser 140 hp engine. I bought it about a month ago, and am almost ready to get her in the water. My power trim will only trim up if the boat is in neutral. I haven't...
  17. jcupo6

    Power Trim Question

    I have a 1973 Starcraft Holiday with a Mercruiser 140 hp engine. I bought it about a month ago, and am almost ready to get her in the water. My power trim will only trim up if the boat is in neutral. I haven't owned a boat in a while, but this seems strange to me. Should't I be able to trim the...
  18. jcupo6

    U-Joint and Gimbal Bearing Replacement

    I recently purchased a 1973 boat with a mercruiser drive and a 140 hp Chevy motor. The guy that had the boat before me didn't do much in terms of service. I was wondering what the tell tale signs are that the the U-Joint, or the gimbal bearing needs to be replaced? Thanks in advance!
  19. jcupo6

    Water pump impeller wrong direction

    Would installing the water pump impeller in the wrong direction make a clanking sound when the drive is running?
  20. jcupo6

    Merc Outdrive Clank

    So I bought my boat on Monday, and the guy ran it for me and everything sounded fine, except for a low whine. I asked around and people told me that it probably just needs the the outdrive oil to be changed, or it could just be the way the drive sounds. Yesterday I replaced the water pump, and...
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