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  1. M

    Thought my boat would be faster

    I’ve got an 81 MFG Piper 1500 with 120 Mercruiser in it. It weighs 1350 lbs. it’s got a 15x17 p prop on it. Admittedly, the prop has got some significant wear to it. Considering the size and weight of the boat, with two adult guys(500) in it, I thought if get better than 30.5 mph. Bummer. The...
  2. M

    Trim oil leak into bilge

    It’s one freaking thing after another…. Nice day on the river and the trim up won’t work. Looks like my set up is different. Question. When there is a leak into the bilge, is there a most likely culprit? ie. Loose flare nuts, Pump seal, split hose. I’ll be working practically blind on this...
  3. M

    Throttle spring on 1981 Mercruiser 120. Courting disaster

    The other day I had my new to me boat on the Ohio river. Hit some major waves and the throttle went wide open. The boat nearly went out of control. Obviously, the tension of the spring pulled it there. Why the hell is this thing installed. On my set up, it looks like original. I had misgivings...
  4. M

    Rochester 2 jet accelerator pump I weird

    I’ve never owned an I/o before. Here’s the deal. The accelerator pump squirts fuel into the carb throats at a nice full stream….when you pull the throttle control handle BACK!!! Bak towards neutral I tell ya!!!Boy is this counterintuitive! I’m taking the carb off to clear the jets anyway...
  5. M

    2.5 Mercruiser dies at 1200rpm in gear

    My engine dies at that rpm in gear every time. Pull the throttle back to under that and it’s fine. It’ll run all day. New plugs wires coil electronic ignition. The accelerator pump works. After it dies I prime it to get it to start again. When in neutral it runs fine at any rpm. Before I pull...
  6. M

    Been here just an awhile but I’ve noticed……that

    in other mechanical threads I belong to the result of the fix is almost always posted. Here. There’s a fix and the mechanic completing the fix evaporates POST YOUR FIXES WHEN YOU COMPLETE THEM!!!! This would not happen on the MGExperience of which I also belong.
  7. M

    Where are the rear motor mounts on a mercruiser 120?

    Can’t get rid of the knock on this n”ew to me boat” and figure I should pull it and replace the bearings. I’m wondering how long the Total job should take got all the tools and access to a hoist. Any tips to avoid a slow down. Think the PO gave me a bit of a bend over. Least the parts are cheap...
  8. M

    MFG PIPER1500

    Has anyone ever seen this 15 footer before? I’ve got one. It’s got a 120 Mercruiser in it. I’m working on it now. A 1981. Can’t find any pics of it.
  9. M

    Cool battery charging cord I’ve been using

    I’ve found this set-up helpful for charging hidden or obstructed batteries. I attach the female end permanently to the battery and then hook the male end to a charger. When I need to charge I just plug it in. The connectors are color coded, the wire is polarized and you can see that on the male...
  10. M

    Videos as attachments?

    Ahoy! Just joined yesterday. Am I correct in noticing that you can’t send a video, say, of your running motor as an attachment?
  11. M

    1981 Mercruiser 120 knocking

    The boat is new to me. It has 422 hrs on it. I’ve done a valve adjustment on it. Dynamic then cold. The engine oil looks like new. It this knock. Hard to tell wear it’s coming from but maybe top and front. Appears that way. I removed the belt to see if the accessories were involved. Doesn’t...
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