Recent content by jrocksho

  1. J

    1990 Mercury 150XR4 getting kinda hot

    I have a 1990 Mercury 150XR4. Noticed temp gets to about 3/4 mark or higher while running. Can idle all day at normal temps, but when I start running temp slowly rises. No alarm yet, but seems to get hotter the faster I go, then back to normal at idle. I change my pump every year and a half or...
  2. J

    water pump problem?

    1990 mercury 150xr4. i've already posted my problem with not much help, but still much appreciated. i have some more info that might help. i ran on muffs and i could feel air coming from tell tale. water pressure is higher than normal at idle and while running. sometimes, maybe after it warms...
  3. J

    high water pressure

    1990 Mercury XR4 150hp. I replaced upper housing assy., t-stats, poppet assy., and I still have 28-30psi at 5000-5500rpm's. What else could cause this? Before the changes, I was at about 25psi wot, now I'm almost pegging the gauge. Please help me if this is even a problem, I've never seen...
  4. J

    water pressure high and surging

    1990 mercury 150 xr4. i just changed water pump assy, engine was overheating at idle and cold while running. i just bought and will be changing both t-stats and poppet assy. i was wondering if there's anything else i should look at to fix this. i think the t-stat or poppet is the problem...
  5. J

    power pack?

    hello everyone. i have a '90 mercury 150 xr4. doing my spring maintenance and noticed the white jumper wire that connects my two power packs is swollen. obviously the wire got too warm and began to melt insulation, but it didn't melt. the wire insulation is really soft and loose on the wire now...
  6. J

    Performance Plus boats

    Hello fellow boaters, I own a Performance Thruster 15' bass boat. Just wondering why I can't find any info or specs on my boat. If any of ya'll have info or a link to a website, please let me know. If ya'll got a boat like this, what is your set-up, and how does it run? eng size, rpm(wot)...
  7. J

    How should this setup perform?

    I have a '85 Performance thruster 15' bass boat w/ '85 merc in-line 6 115 H.P. I have a 22p turbo S.S. prop w/ factory cupping and a 7" jack plate. Prop shaft is appox. 2-3 inches below, cav. plate is 11/2" -2" above bottom. Top speed is around 48 MPH at 4800 RPM by myself w/ fishing gear. I'm...
  8. J

    Prop/engine height help

    Hi, I have a '85 Performance Thruster 15' bass boat w/ '85 merc 115hp in-line 6 on a 8" or so jack plate. What would be recommended prop size and engine height? Prop shaft is about 3-4 inches below keel. Cav plate is about 2-3 inches above keel. Ran 51 mph w/ 131/4x24p @4700 rpm WOT. Ran 46...
  9. J

    Lower Unit Oil Black?

    What could cause my lower unit oil to turn black? I was thinking exhaust leaking into gearcase.:confused:
  10. J

    engine height???

    :confused: I have a 1985 15' performance thruster w/ 1985 mercury 115hp inline-6 with a 6" "Rapid Jack" jack plate. Please help with how to measure what height my engine should be? Some say prop shaft should be couple inches below pad, some say cavitation plate should be couple inches above pad...
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