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  • FICHT 175

    I've got a '99 175 FICHT on my Sea Pro 1900 Bay and last time I had it out I noticed a slight surge while running at 3k-3500 rpms. Would drop 100-400 rpms for about 1-3 seconds then return to normal on a fairly consistent rhythm. At first it was almost un-noticeable other than a slight sound change, but after 10 min or so even wife started noticing it. I'm thinking it's fuel related, maybe in need of a new separator/filter? I didn't notice it on the trip out, only on the return. When it would start to drop I was able to throttle it up with no hesitation. Once in the channel it calmed down enough I was able to open it up, and it didn't do it for the 3 minutes or so at WOT. I ran out of road so I couldn't run any longer at that speed (nearly 60mph) and the rest of the trip was inshore with a 25mph limit. It didn't seem to do it much after that but . I would still like to figure out what it is. Especially since I'm selling the boat.
    '90 Tuppens 231 Polk City, FL

  • #2
    Start with the simple filters and plugs. Then move on to more complex like the vst cleanout and pump screen clean. I would not spend much money on it though. The early Ficht 175 dont have much value...unfortunately. that was THE engine that brought OMC to their knees...
    [br]1994 Mako 215 Dual console Optimax 225[br]1978 Mako 19 with 90hp johnson[br]1996 Mako 22[br]1982 Mako 171 Angler 135 Black Max Mercury[br]1987 21b 225 Yamaha[br]1974 23 inboard Gusto gone.[br]1979m21 225johnson \"blue dolphin\" bought off this board and restored [br]with everyone\'s help!!Gone but not Forgotten....[br]1979 20 Mako 115 Suzuki gone[br]1977 19 Mako 115 Johnson gone[br]1976 23 Mako twin 140 Johnsons gone[br]1983 224 with closed transom and bracket[br]And 162 SOB (some other boats)[br]Venice Florida, Traverse city Mi.


    • #3

      "....I noticed a slight surge while running at 3k-3500 rpms."

      In the interest of technical accuracy and correct usage:

      RPM = revolutionSid="red"> per minute. No need to add the extra "s" on the end.
      Bungo Pete[br]Portland Maine[br]1970 Mako 22, 200 HP Mariner


      • #4
        I've seen this before on my old engines and it was the water pump giving out.. Something to look into..


        • #5
          my hpdi would do this and it was 99% of the time the VST filter. Keep your fuel clean with this engines and your filters changed. If your's is still running you might have one of the unicorn fichts, i.e etec version 1.
          1978 Mako 25 - Blind Hog
          1985 Mako 20c - sold
          Fort Walton Beach, FL