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  1. W

    200hp efi overheating

    yes, a rubber O-ring around each piston and a bigger rubber gasket around the perimeter of the head and I replaced all of them
  2. W

    200hp efi overheating

    I changed the spark plugs about 2 months ago, all were the same color. There was no water in any cyl.. I also borescoped all cyl. and all looked good. I did use new bolts. The motor starts right up and runs strong, gets on plane quick, no hiccups or misses it's just that the temp. goes up so I...
  3. W

    200hp efi overheating

    I'm going to take the lower unit off tomorrow and have a look around the water pump and exhaust as it's an easy thing to do. If I'm still overheating, I'll be taking the head off and check for flatness. When I took the head off before, the divider plate was really clean. I was really surprised...
  4. W

    200hp efi overheating

    ok I'll check the head bolts, but do you know the torque? the book says 30 lbs. then tighten another 90 degrees but I used a number I got on the web back when I did the job but can't remember what it was. Or I'll just find a tight one and use that number
  5. W

    200hp efi overheating

    thanks for the replies guys. so I guess I should do a compression check , would that be my next step ?
  6. W

    200hp efi overheating

    I replaced the whole kit, and I do it every 3 years. As for the exhaust gas, doesn't it surround the water pump as it goes out through the prop. and wouldn't it build up pressure the faster I go. The temp gauge goes up after about 2000 rpm. Thanks again
  7. W

    200hp efi overheating

    thanks for the reply, I did not check for flatness, I have a diagram in my service manual for where they go, I did get an overheat alarm once but as soon as i throttled back it stopped. On a youtube video I watched on overheating someone replied that his water pump housing had a little seepage...
  8. W

    200hp efi overheating

    2002 0t556519, in 2023 I replaced head gaskets on starboard side because of water in the 2 lower cylinders, ever since then the temp. gauge goes up above 2000 rpm. it's only on the starboard side that gets hot, I've changed water pump, poppit, rydelimed it but it still gets hot, looking at my...
  9. W

    2000 Mercury 200efi random no spark

    I have the same motor but a 2002, not sure about your spark problem but I never have to pump the primer bulb all season it stays firm all the time, maybe you have a bad fuel pump , there are 2. one diaphragm and one electric. there's a Shrader valve (looks like a car tire air valve) on top front...
  10. W

    '00 Mercury 90hp, oil injection still works, time to replace it with premix or replace worn parts?

    ok thanks , I guess I won't be changing that !
  11. W

    '00 Mercury 90hp, oil injection still works, time to replace it with premix or replace worn parts?

    I have 2002 200 hp efi , should I replace my gears and are they sold separately, as I could only find the whole pumps. Thanks
  12. W

    2002 200hp efi saltwater water in cyl #6

    it's the middle and lower cyl on starboard side , the middle one was just a few drops of water , the lower one an ounce or too. I ordered the gasket and seal but they won't be in until Tues. or weds. . I also took off thermostats housing and there was no thermostats in either side . my dealer...
  13. W

    2002 200hp efi saltwater water in cyl #6

    so I got the divider plate off , only 1 bolt was a little tuff to remove , and it was not rotten at all , a little carbon but not bad , so where should I be looking next ? head gasket ? Thanks
  14. W

    2002 200hp efi saltwater water in cyl #6

    thank you , I will get to boat today and have a go at it and let you know how it goes . thanks for your help .
  15. W

    2002 200hp efi saltwater water in cyl #6

    ok it's a "o" didn't know that Dukedog . I clicked on your picture above your name , in the picture is the divider plate between the 2 cyl. banks . Thanks
  16. W

    2002 200hp efi saltwater water in cyl #6

    ok thanks , where is that located and how hard a job to replace ?
  17. W

    2002 200hp efi saltwater water in cyl #6

    serial # OT556519 engine ran fine all last year , when taking it to boat ramp at end of season in no wake zone (about 10 min ride) notice temp gauge going up , no alarm sounded and no sign of over heating. where i keep boat in winter i hooked up garden hose (not muffs) and flushed with water...
  18. W

    water pump and shift shaft position

    thank you !
  19. W

    water pump and shift shaft position

    it's all put back together and engine runs in forward and reverse as stated in post #8 , just want to make sure it's good to go before i put in water
  20. W

    water pump and shift shaft position

    so i should be good to go right ?
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