Search results

  1. C

    Rotate Impeller on Occasion

    Cyclops, You are kidding, right?
  2. C

    94 merc 150 xr6 over heat

    That motor is cooled at low RPM by the thermostats. At high RPM it is cooled by the poppit valve. Did you check/rebuild the poppit valve? Have you checked the water intake holes in the gearcase for blockage. Often a broken piece of impeller will fall under the waterpump and clog that up...
  3. C

    Mercruiser 5.0 MPI - Constant beeping

    Also, some of the MerCruisers had a temp sender for the temp gauge and an overheat sensor for the alarm. Make sure the wires were not switched as the overheat sender was either ungrounded (normal) or grounded (overheat). The temp sender for the temp gauge was a variable rheostat with different...
  4. C

    Mercury BlackMax 175Hp, difficult staring, and then bogging down.

    Look for a silver disc on top of the block. It should have the serial number. My '93 has that exhaust idle relief tube, but I do not see it on your motor. You might reconnect your overheat sensor, as I see the tan wire hanging loose. Of course, it may be the temp gauge sender wire, it is...
  5. C

    Gph at various rpm...thoughts?

    It is very hard to give accurate numbers for your boat. It depends on hull design, trim position, load in the boat and other factors. i.e I had a Merc 1500 IL6 on my speedboat, for years. Once I had the boat loaded with camping gear, more than I ever loaded it up before or since. I ran...
  6. C

    Mercruiser 5.0 MPI - Constant beeping

    You do not give a year. The engines changed a bit over the years, especially the thermostat housing. The temp alarm would sound if the sender wire was grounded. The sensor would ground the wire when it overheated. If the temp alarm wire fell off and touched the block or got pinched causing...
  7. C

    Mercury BlackMax 175Hp, difficult staring, and then bogging down.

    What year is that motor? What is the color of the spark plugs? What spark plugs do you have in it? What kind of a beep does it have? Solid tone or intermittent? A lot of those motors have an exhaust idle relief hose from the block thru the lower cowling. Make sure that is indeed sticking...
  8. C

    Rotate Impeller on Occasion

    Rotating the driveshaft every few months will do nothing good or bad IMO. I believe the impeller will last just as long either way.
  9. C

    Rotate Impeller on Occasion

    Impellers that are flipped over often fail catastrophically, in short order, and that is bad for the motor.
  10. C

    1986 Mercury 35hp Throttle/Spark Advance issue

    Hanes manuals are not very good. Seloc and Climer are usually worse. A Mercury service manual is what you need.
  11. C

    1986 Mercury 35hp Throttle/Spark Advance issue

    It sounds like some part of the throttle linkage at the motor is mis-adjusted. I am not familiar with your motor exactly but look for adjustments from the throttle arm to the carbs. There are often stainless steel rods that have some threads. You will want to lengthen those to push the...
  12. C

    Recommended reading?

    There was a paperback book that was cheap. I think I got it at West Marine, but it has been a long time. The wonders of the internet...here it is...
  13. C

    Thickness of Mercruiser 140 Manifold at Drain Plug Hole

    Gee, bend a paperclip end to a 90*, and stick in in the manifold until you can hook the inside of the casting. Mark the part that sticks out. Now tape and mark the threads of the petcock with the depth mark and screw it into the manifold until it matches the mark.
  14. C

    Looking for old fasteners

    Gee, we used them to put thru the holes in paper, to assemble a manual. Those were more like #10, vs 1/4" though.
  15. C

    1986 Mercury 35hp Throttle/Spark Advance issue

    It is likely that the throttle arm will not move back to idle on it's own. The throttle cable is adjusted to push the throttle closed, and a bit of preload is added to help the operator feel neutral. The carb spring is only designed to close the throttle plate, not move the whole linkage...
  16. C

    1986 Mercury 35hp Throttle/Spark Advance issue

    The throttle itself is pushed back to idle by the throttle cable. The throttle cable should push the throttle arm against the stop, with some preload. However, the carbs have their own spring to close them. That is where you need to look.
  17. C

    Mercury lower unit cross reference

    SEI (Stern drive Engineering) makes these for the smaller Merc engines. They did not have your model number, but maybe one will work. https://www.sterndrive.cc/product/90-205.html
  18. C

    1998 evinrude 225 ocean pro, no spark! Help!

    You might get a factory service manual. marineengine used to carry them. Have your model number on hand. Do you have the optical sensor ignition? Are your coils in spec? This info and more would be in the service manual. On my '98 Johnny 150HP engine, battery power is supplied to the...
  19. C

    83' 115hp Mercury, prop slip

    Unlike Jimmbo, I have had very good luck with turning point props. I have 4 or 5 of them. You will want a 19 or 21P prop, likely the 19P prop would give better all-around performance.
  20. C

    83' 115hp Mercury, prop slip

    A cupped prop holds the water much better, allowing more trim and therefore more speed and efficiency. Check out a turning point hustler in 3 blade. They have good rake and cup and are high performance for aluminum.
Top