Search results

  1. J

    Mariner prop questions and RPM questions

    Any idea the RPM this 1985 Mariner 30 M (30 hp) motor should run?<br /><br />Its pushing a starcraft 14' thats rated for a 40 hp. It supposedly does 20 mph (a friends speedometer on his boat said so but who knows). But it doesnt seem to rev very high at all. In N it revs VERY high if i want it...
  2. J

    Where do I plug in a tach?

    The motor is an '85 Mariner 30 hp (model 30M). Where can I run wires for a tach off the motor? Is there a common place thats safe? Or is there already an existing wire? Thank you <br />-John
  3. J

    what kinda prop do i need for a 14' tri hull?

    The boat is a starcraft tri hull 14' open deck design with a center console. Im running an '85 Mariner 30 hp on it, the max hp is 40 for the boat. The boat planes out instantly, and gets to the cruising speed in a few seconds, (25 mph Wide open). <br /><br />It has a lot of low end power, would...
  4. J

    converting to longshaft?

    I tried a short shaft 35 hp evinrude on my 14' startcraft tri-hull today and once on plane it over-revs and goes slow as death.<br /><br />The boat is rated for a 40 hp and im assuming that I need a long shaft for this boat. <br /><br />Anyway to convert my motor (a mariner 30 hp short shaft) to...
  5. J

    water in lower unit oil

    I bought an '80s Mariner 30 hp (model 30M) and I changed the lower unit oil when I bought it. I took it for a run yesterday and it ran great but I noticed that oil was leaking from various holes on the shaft. So I drained the lower unit oil and A LOT of water came out.<br /><br />What happened...
  6. J

    What year is this Mariner 30 hp?

    Just wondering what year this motor is, its a Mariner 30 hp.<br /><br />Serial/Date Plate: 689 - S - 025967<br /><br /><br />I know mercury makes this motor- is it considered a better motor then mercury or a cheaper motor?<br /><br />Any common problems with this motor? <br />Thanks for any...
  7. J

    What year is this motor?

    Hey all, <br /><br />Just wondering what year this motor is, its a Mariner 30 hp.<br /><br />Serial/Date Plate: 689 - S - 025967<br /><br />Any commen problems with this motor? <br />Thanks for any info.<br />-John
  8. J

    How much HP for a 16' fiberglass?

    Hey everyone, we just got a 16' Starcraft fiberglass boat, its an older model (70') and its rated for a 40 hp. Question- would a 25 hp be sufficent for this boat? I want something with some decent speed but I mainly fish and cruise around so I dont need an all out speed boat.<br /><br />The boat...
Top