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Recent content by maxtor

  1. M

    Float Level or Float Drop

    "When starting my boat, whethe "When starting my boat, whether cold or warm, (120 HP Mercruiser) it seems that since I rebuilt the carb, that I have to hold the key for a longer period of time before it finally starts up. Like it's not getting quite enough fuel to start up quick. Before doing...
  2. M

    Slight bog when given throttle

    "I know I have seen this discu "I know I have seen this discussed somewhere already but be damned if I can find it now that I need it. Anyway, just did a rebuild on my carb and did some idle adjustments according to posts that I read here, and believe I have it running pretty good now...
  3. M

    Carb Question

    "I want to go buy a Carb rebui "I want to go buy a Carb rebuild kit and just want to make sure I have the right info. On the carb, one of the screws has a gold plate under it that says: Mercruiser MCM 120/140 1389-8490 Does this mean it's a Mercruiser Carb or is there some other info...
  4. M

    In Dire Need of assistance

    "I've got a problem with m "I've got a problem with my boat that I am in DIRE need of some help or advice. It's a 120 HP Mercruiser in a 1985 Sylvan. Here's the scenario: A few weeks ago, brought the boat to the ramp. It started right up, idled great, and ran great at full throttle...
  5. M

    Which battery should I use

    "I'm shopping for a new ba "I'm shopping for a new battery and have been given conflicting advice so thought I would ask here. One person told me that I should get an 800 CA Battery, but yet a guy at a battery shop near me told me that a 650 CCA battery would be better. I'm putting this in a...
  6. M

    Water Separators

    "These gas line water separato "These gas line water separators, is there a trick to getting them off to replace them? Do you have to release pressure from the gas line or something first? The guys at the marine shop that installed mine, put it in a place where I can't get a filter wrench on...
  7. M

    Winterizing

    "In the manual, it says that Q "In the manual, it says that QuickSilver is recommended and the manufacture DISCOURAGES the use of multi-viscosity oils, such as 20W-40 or 20W-50. However, in trying to avoid buying my oil at the Marine shop because of extremely high prices, I found...
  8. M

    Which Outdrive

    "Hear all the talk about diffe "Hear all the talk about different types of outdrives (Bravo, Alpha 1) and I was wondering how I could tell which one I have. If standing at the bakc of the boat and looking at the outdrive, it has a sticker on it that has a big "4" on it and below that it has 2.5...
  9. M

    Cleaning Motor

    "Just wondering, are these Mer "Just wondering, are these Mercruisers kind of like a vehicle motor? I mean, my truck, I like to take a power washer and hose down the motor every once in a while to help keep it clean and run cooler. Can I do the same thing with my boat motor to help keep it...
  10. M

    Speedometer acting up

    "Running a 120 HP Mercruiser a "Running a 120 HP Mercruiser and just bought the boat about 3 weeks ago. Anyway, I noticed the other day, while I was out in it, that the speedometer is acting up. For a few minutes, it didn't even work at all, then suddenly it started working. I also believe that...
  11. M

    Black substabce in water

    "This may sound like a dumb qu "This may sound like a dumb question but since I am new to owning an I/O, I need to ask. I noticed today, that my boat, (which has a 120HP Mercruiser) when it is going slow or at idle, leaves a black substance behind it in the water. Now, I'd have to guess that...
  12. M

    Tachometer adjustments

    "Just curious if a tach can be "Just curious if a tach can be adjusted or if it's off a bit, simply needs to be replaced? I've got a 120HP Mercruiser and the tach on this boat is off. When the boat is shut off, the tach sits at about 600 RPM. Recently had it in the shop, and the guy told me...
  13. M

    Prop pitch problem or other

    "Hello everyone, Have a qu "Hello everyone, Have a question for you as I am puzzled and getting different answers. I have a 17' Sylvan Bowrider with a 120 HP Mercruiser I/O. Right now it is running a prop with 20 inch pitch. My RPM's at full throttle are running about 3500 and...
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