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  1. tango13

    Block draining idea for older Mercruiser v8

    Hi All, Like most boats, mine is a major PITA to winterize. I have to remove my whole rear bench interior, just so I can crawl in to drain the block plugs on the old 350. I would really like to set it up so I can simple reach into the engine compartment to winterize (also planning to relocate...
  2. tango13

    Grease zerk pulled out from top of MC outdrive, swivel shaft

    Went to grease my outdrive a few nights ago with a new grease gun and ended up ripping the whole swivel shaft zerk out from the top of the outdrive. The threads didn't look completely destroyed, so I took another zerk and slowly threaded it back and forth, further and further into the problem...
  3. tango13

    Mercruiser 1.32 ratio behind a 250 hp SBC?

    Hi all, I was installing new decals on my mercruiser outdrive this spring and noticed a few things that are not adding up: My outdrive has 1.32 stamped as the ratio, has a "250" hp decal, as serial number reads 4734559 (the 3 might be an 8, not 100% sure). From what I was reading up online...
  4. tango13

    '78 Mercruiser 250hp idle speed shake

    Hi all, Late season last year and this summer iv been noticing a shake when I put my merc into gear. My carb is set to idle at 750 (warm), and once in gear, it shakes untill about 900rpm, then no problem. Im running a stainless prop, which was balanced and repaired a few years back. Iv had...
  5. tango13

    Aluminum intake on a '77 Mercruiser 350

    I have an older 70's ski boat (1978 18ft American Eagle) with a merc 350/250hp w/original outdrive. Looks like the intake manifold gaskets are ready to be changed, and I am wondering if there is anything to gain by picking up an aluminum intake swap out with the stock cast iron intake. On a...
  6. tango13

    Best oil extractor

    Hey everyone. Spring is around the corner and its time to start thinking about a little boat maintenance.. I bought my first boat a year ago, and I am in need of an oil extractor for the motor. Its a 78' merc/chev 350. Dipstick is on the starboard and has threads for an extractor. So whats the...
  7. tango13

    Confirming Ignition upgrade

    After a ton of research, I want to confirm my plan for my ignition upgrade before getting started. On my 1977 Mercruiser "250hp" 350, Ill be doing plugs, cap, rotor, wires, Pertronix ignitor, and coil. Since the coil is externally resisted, I'm going with a new coil with a lower primary...
  8. tango13

    trying to figure out pertronx ignition upgrade

    coil ohm question Hey everyone, Bought my '78 American almost a year ago and i'm just about ready to order parts for complete tune up (motor runs okay but everything appears to be original factory equipment and 25+ years is a little overdue IMHO).. I'm going with a pertronix system as far as...
  9. tango13

    Drive shower for pre-alpha

    Has anyone every had a pre-alpha equipped with drive shower? I know these things raise a bit of a debate but I'm interested in having on installed on my outdrive (77' merc 350/250hp). I have looked at a few manufacturers but they are all for the alpha and bravo drives
  10. tango13

    Outdrive gear oil

    Hey everyone, I was just going through all my extra oil bottles in the garage and took a careful look at the bottle for the gear lube I put into my boat this fall. I bought this boat at the end of the summer and used it a couple times. It has a chevy 350/ MC-1 "250hp" outdrive that is in great...
  11. tango13

    Spark Plug & Wire Options

    Hello all, Planning to get parts for a spring tune up for a newly acquired boat w/ 77' 350 merc (250hp). I dont have much history on the engine other then it has a new set of points/rotor/cap and new fuel pump... Spark plug wires look to be the original mercruiser factory wires.. Plugs possibly...
  12. tango13

    Draining exhaust risers and (mostly) stripped manifold drain hole

    Hi guys, recently winterized my 78' mercruiser 250 (350ci), and I noticed brass plugs on the exhaust risers... I opened them up an water drained out. From what I understood, all the plugs required to drain where the 2 block drains, 2 exhaust manifold drains, and power steering cooler.. This is...
  13. tango13

    1979 Mercruiser 250 I/O info

    Hi everyone, just bought a 1979 ABC American ski boat with a Merc. 250 I/O. Guy who sold it says its a 350cu Chev.. no spec stickers on the valve covers so I'm not entirley sure about the motor.. I hope its a 350. Leg is a 250 model. Iv looked around on the internet for info but couldnt find...
  14. tango13

    1975 mercruiser 233 drive, 351 ford, any good?

    Hi there im new to this site. Im looking at buying an older ski boat soon, a 1975 apollo starfire.. similiar to an american, jolly roger, etc.. Boat has a mercruiser 351 with a 233 drive. Dumb question but is that "233" the hp rating?? I know my dad used to have a merc 305/228 drive and that...
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