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    • Cummins Marine Forum Topics
    • Possible shamrock repower

      This topic has 2 replies, has 3 voices, and was last updated byDave Morris 4 years ago

      March 21, 2018 at 8:50 am Thinking about repowering a 1987 26 shamrock stalker. Boat weighs about 6000 lbs dry currently with a pleasure craftt 350 gas direct drive inboard. Boat will be used mostly in Arkansas but trailered to coast for some “real” fishing and diving adventures. Currently has 54 gal port and starboard fuel tanks total 108 with about 100 gal usable. I would like to increase speed thinking of around 350 to 380 hp Cummins 6bta? Currentl…

      Started by: John Kurtz in: Boats & Repowers

      2 Replies
      February 13, 2020 at 5:39 pm Hi Tony, I sure wish I was west coast for this repower but I appreciate your contributions for all of us elsewhere in the world. I am repowering my 26′ Shamrock 1990 Open (Center Console) and have a refreshed 6LPA nearby I can put into it. I wonder if you have those photos you referred to above and any performance numbers to justify the “Sham Rocket” moniker? I thank you in advance if you have them and if not thank you again …

      Last Post by: Dave Morris posted: 4 years ago

    • Possible shamrock repower

      This topic has 1 reply, has 2 voices, and was last updated byjohn 6 years ago

      March 22, 2018 at 5:55 am Thinking of repowering a 1987 26′ shamrock stalker…..used mainly in freshwater lake but would like to trailer the boat to the coast for some fishing and diving adventures I was thinking about 380 ish hp. Boat weighs about 6000 pounds dry with the 350. Would like to gain speed, fuel efficiency, and dependability Currently has port and starboard fuel tanks 54 gal each Also have some concerns about prop clearance shaft size runnin…

      Started by: John Kurtz in: Boats & Repowers

      1 Reply
      March 22, 2018 at 8:46 am I take it you want to put a diesel in it. I’m a big fan of shamrocks. They put a lot b series in the 26 shamrocks. Most were 210 hp. Big difference from that and 380 hp. Personally I think I would look for one of those. You have a ton of issues to deal with. Exhaust, fuel returns, shaft sizing, will it fit, prop clearance to name a few. This site has a lot of info on shamrocks https://forum.classicshamrock.net/ Great project though goo…

      Last Post by: john posted: 6 years ago

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