Recent content by duped

  1. duped

    Stupid Haunted Mercruiser Warning Buzzer

    2000 Merc Horizon 350 MPI inboard. Once last year and now again this past trip I get a constant warning buzzer from my starboard engine. Both times it has happened after running at low RPM while trolling, and only after 2-3 hours of running. As I understand from the manual it is either an oil...
  2. duped

    Coolant type

    I am trying to find out what type of coolant my 2000 Mercruiser Horizon 350 MPI uses. I like to keep spare fluids on board and I have no idea what to buy. I think it uses dexcool?, it looks pink or maybe orange in the recovery bottle. Anyway, I would like to match whatever it had originally to...
  3. duped

    350 Mag MPI low idle

    Hi all, I am having a little annoying problem with one of my engines. It's a 2000 Mercruiser 5.7 MPI Horizon straight inboard S/N 0L394846. The idle is steady at about 500 RPM instead of the 600 listed on the flame arrestor cover. The other engine is at exactly 600. Ordinarily I wouldn't care...
  4. duped

    350 Horizon Randomly Shuts Down

    2000 Mercruiser 5.7 MPI Horizon straight inboard S/N 0L394845 Each engine has its own battery and battery switch. Starboard engine starts and runs fine. Port engine does too, but randomly shuts off completely, usually within a few minutes of starting it. No buzzers, no warning. When this...
  5. duped

    Any way to avoid breaking shift cable off?

    As the title states. I've done a few shift cables over the years, and it seems like every time I do, the brass "nut" snaps off clean. I thought I learned a couple things after I broke the first one years ago. First, I cut the cable sheath with a bolt cutter so that it's able to spin free. I...
  6. duped

    Running starboard engine off port fuel/water sep?

    Hi, I have an idea that I was trying to gain some professional opinion on before attempting. I have a boat with twin 5.7l carbureted Mercruisers. My power steering is on starboard engine only, leaving me forced to troll only on that engine to keep my hydraulic steering system happy...
  7. duped

    Mercruiser tach issues

    Have a boat with twin 1985 260 Alphas. Previous owner stated the port engine's tach sometimes needs a whack before it would work. Tried that, it seems like it has completely died. No worries, bought a tach, made sure it was set to "8" and made sure all the connections are good. This one goes...
  8. duped

    Trim manifold replacement + anode

    Have a boat that is kept in freshwater, it has had some corrosion issues which I have narrowed down to broken continuity straps, old/decayed anodes, and bottom paint right up to the gimbal housings. I have fixed these issues, new magnesium anodes, and refinished the drives. The last this on my...
  9. duped

    Dipstick issues...

    Such a silly thing, I know. 1985 Merc 260s. Port motor has dipstick on left side (when looking at the front of the engine), starboard engine has dipstick on the right side, and the actual stick is missing. I've been using the port motor dipstick to check, however it hits the bottom of the pan...
  10. duped

    I need to run engines without water source...opinions?

    Heres the deal, I have a boat that has been sitting for two years. It was last in the water in the fall of 2013 and winterized by my marina since. It has twin 1985 Mercruiser 260/Alphas. I have the drives off, I just refinished, replaced impellers and pressure tested them. I am at the stage...
  11. duped

    What's this on my lower unit?

    I'm sure these threads never get old...Working on my 85 Sea Ray with twin 5.7s Alpha Ones. One drive is original, the other is a 1988 going by the serial. The 1988 lower unit has this odd "thing" bolted to the end of it, it has two bolts, one on each side that seem to hold it on and the...
  12. duped

    Haven't seen this done before

    Saw this looking at boats on Craigslist. I figured there would be a way to make Gen 2 drive work on the older transom stuff but this is the first time I've seen it done. (Probably out of necessity...bought the wrong drive?)
  13. duped

    Merc 5.7 runing rough out of the blue

    Hey guys, having some issues I would like some input on. Engine is a 1995 Mercruiser 5.7 I installed last year. I bought it as a long block to replace an '86 305 and I am using all of the 1986 peripherals (Thunderbolt IV ignition, Alpha one gen 1), so for all diagnostic purposes, consider it a...
  14. duped

    Lost reverse, can't get it back...

    Hello all, I've run into a snag and need some advice. Changed shift cable on my 86 alpha one. I know I have it routed properly, as the engine was out of the boat when I installed it. I followed all procedures down to the letter, including adjustments. This is actually the 3rd one I've done...
  15. duped

    Best places to tap for fuel pump?

    I have all but completed an engine swap into my boat. The engine is newer and does not have provisions for mech. fuel pump. All other marine related parts/harness are transferred from the old motor (1986 merc 305). I have purchased a nice carter marine electric fuel pump, and also a oil pressure...
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