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  1. M

    Stator issue ( I believe )

    Working on a 2001 90hp Yamaha Model 90TLRZ issue is it wont come on plane. I have done some test on the stator and for starters I'm getting conflicting information. A the manual calls for the low speed coil test Red and brown 60 dc volts and high speed coil test red and blue 100 dc volt ...
  2. M

    Engine model number

    I have 2 engines I am trying to locate model/ year of production for the serial number of the first 1 is R8180101 it is a 25 hp Tracker / Evinrude The 2nd one is R8225860 with a partial model number of E100S it is a 100 hp Evinrude I have posted pictures as well
  3. M

    Slop in steering / power steering control

    Any idea what would cause this slop and how it can be fixed. If you notice the sleeve that’s going through the power steering control is moving in and out
  4. M

    250ProXS Diagnostics results

    The engine is running rough and not hitting max rpm . no fault codes present but looking at the sensors the only thing that stands out is the engine load is showing 100% while the engine is not running. if it was automotive id be thinking MAF sensor ? what's you guys thoughts ?
  5. M

    Unidentified wire

    Working with a 1998 mercruiser 4.3 I have a purple wire with a white stripe that is connected to a black wire. it comes out of the wire harness right where the fuel pump connects. My wiring diagram shows purple/white stripe wire is for trailer trim but it doesn't show that it connects to a...
  6. M

    Help with year and ID of engine

    Omc I believe 89 year but when I look up model and serial I come up with a blank Number on transom bracket is MOD 985680 or 985880 And SER T0183125 Number on drive unit MOD 986702 And SER T0730645 Number on valve cover MOD 985689 And SER T0627247 Thanks in advance
  7. M

    Batwing manifolds

    Does anyone know when Mercruiser stopped using the 1 piece manifolds?
  8. M

    1999 40 hp 2-stroke oil leak

    I have a 99 40hp serial number 0G795146 that's new to me when I bought the boat I noticed oil on the transom bracket and inside the cowl. So I cleaned it all up removed the reservoir and checked for a leak.. I didn't find anything so I put it back on and marked the level of the oil it set for...
  9. M

    Engine Mount Installation Tool

    So I bought an engine mount installation tool.. I got it used after receiving the tool and looking up at the instructions for the tool it seems that I need spacers that come with the tool but when looking the tool up there is no mention of the spacers at all does anyone have any experience with...
  10. M

    2008 250 optimax pro XS steady beep

    I have a 2008 250 optimax pro with a steady beep as soo. As the engine starts its a non stop beep .. beep beep beep ........... I have checked the oil sensor and the water separator sensor and there fine I'm thinking I need to check the code so my question is will the Rinda Technology scan tool...
  11. M

    1994 evinrude 150 emptying carburetor bowls then dies

    Ok so working on model number J150jlera. If I pump the bulb until it's hard it will start and run then after running a few minutes idling it will bog and cut off and won't start until I pump the bulb again. My gut is telling me fuel pump but I see there's what's called a vapor pump. Is this...
  12. M

    Mercruiser outdrive gasket

    Has anyone else had issues with the Bell Housing gasket pushing out when torqued to specs ( mainly on the right side looking at the unit) I always use OEM gasket for this but no matter what it always pushs out some times more then others.... Thanks Mark
  13. M

    Alpha 1 gen 1 water pump

    I'm replacing the water pump in an 1988 Alpha 1 gen 1 serial number 0c501178. When I go to the parts look up it gives me several kits. I believe the kit I need is 18-3319 ( I would go OEM but they dont list a kit with the base.. ) When I look at the Sierra catalog it list part number 18-3320...
  14. M

    Trim Manual

    Ok so quick question what manual has the trim trouble shooting and repair info in it ? Thanks Mark
  15. M

    1981 stringer drive leak

    I'm working on a 1981 stringer replacing the transom seal.. I noticed that when I loved the drive oil cam from the water intakes. Ive never worked on one of these drives but I'm assuming this is a seal in the water pump?
  16. M

    Replacing 95 merc 4.3 with 87 OMC 4.3

    Ok I just purchased a 95 marada with a Mercruiser 4.3. The engine has water in the oil and the guy I got it from said when he backed it in the water that engine was locked up. I'm thinking it was hydro locked. None the less, it's been a year with water in oil and possibly cylinders, I have a...
  17. M

    Question on year and Idle mixture screws for XR-6

    Ok first ? can anyone tell me the year of this XR-6 engine I believe its an 1995 but just wanted to confirm.. The serial number is OD167181.. The next ? looking at the manual there's no mention of adjusting the idle mixture screws it states to set at 1 1/2 turns out +/- 1/4 turn and that they...
  18. M

    Shop Tach

    What are you guys using as a shop Tech ? I have a Bosch's FIX 7529 Digital Advance Timing Light with Tach but it shows rpm at 1300 so I'm assuming I divide that by 2 and get 650 ? was hoping to get something to take the math out of it
  19. M

    1986 35Hp Mercury no fire

    Trying to figure out a no fire issue. The info I received from the local mercury dealer was testing the stator Between black/white stator lead and engine ground should be 12-18 I'm getting 13 so good there. right ? Between black/yellow stator lead and engine ground should be 3.2-3.8 I'm...
  20. M

    Which Service Manual

    Working on a Mercury 35hp and I don't know what manual I need. The parts look up only show a parts manual.. The Serial number is 0A988740 and I believe its an 1985 year model but I'm not sure. Thanks in advance for any help
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