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  1. R

    25hp Yamaha 2 stroke water pump

    I am replacing the water pump with a Yamaha kit on my 25mshc 2 stroke. The kit only includes the cup and not the entire housing. My question is, how is the old cup removed? Seems glued in tight. Is there something in the housing that lines the cup up correctly once I get it installed in the...
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    Merc 1994 15 hp Lower Unit Fit

    "I have a 15hp Mercury 1994, that needs a complete lower unit. The old one took in some water and froze and cracked. Could anyone tell me what years of lowers will fit this motor and also will a Force, Mariner, or other Brand fit? What horsepowers are similar to the 15? Thanks for your help.And...
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    15hp Merc Year wanted

    I just bought a 15hp Mercury 2 I just bought a 15hp Mercury 2 stroke with torn up lower unit but nice powerhead. Can anyone give me an acurate year from the serial number? The model year guides ive found only go to 1990. What years and horsepowers fit the lower units on my outboard? In case I...
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    25hp 2 Stroke crankshaft

    "Could anyone set the record s "Could anyone set the record straight for me? I have a 2004 25Mshc 2 stroke, 2 cylinder Yamaha with a bad rod bearing on the crankshaft. It developed a small amount of rust in the bearing due to what I think is a bad head gasket. Water in the cylinder. Is Yamaha...
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    25hp XD 84 Rough idle seems to choke out

    "I have a 84 25xd that is driv "I have a 84 25xd that is driving me crazy. It is hard to start and idles rough.Reving it up it seems to be choking out,running too rich. I rebuilt the carb with the built in fuel pump. Compression is even at 120. Spark seems good. Ohmed the coils and are ok. New...
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    Yamaha 25hp 2 Stroke water in cyl

    "I just bought a 2004 25hp Yam "I just bought a 2004 25hp Yamaha. One cylinder had low compression. After tearing it down the low cylinder had water evidence but the top cyl was nice. Would this be a cracked block or maybe a bad head gasket? I bought it cheap so I want to rebuild it...
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    Mercury 25hp missing

    "I just bought a merc 25hp 198 "I just bought a merc 25hp 1985, with a miss and rough idle. I went thru the fuel systems with a new carb kit and fuel pump. Still the same.New plugs and checked the coils with an ohm meter and they show no problems. Is there a way to check the switchbox or...
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    85 15hp Evinrude Frost plug

    Can anyone tell me why BRP doe Can anyone tell me why BRP doesnt list a expansion plug for my 15hp? Mine overheated and the plug popped out. Are these re-usable? I cant find a listing for them anywhere. Wondering if I should reinstall it with sealer? after I check out why it overheated of...
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    Johnson 9915hp rebuild problem

    "I have a 1989 Johnson 15hp th "I have a 1989 Johnson 15hp that I rebuilt due to a broken ring. It was bored .30 over in one cyl and I added new rings to the other. After completing the rebuild I dont seem to have enough vaccum to work the fuel pump. It will run on carb cleaner shot but will...
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    89 15hp Johnson Piston rebuild question

    "Whats the concensus in using "Whats the concensus in using Sierra pistons rather than OMC or Wiseco pistons in my 15hp Johnson? There cheaper, but Ive never used Sierra pistons. So I dont know there track record. I broke a ring and my machine shop will do the cyl and head work if needed. So I...
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    Johnson 15hp Stop Button

    I have an "83" Johnson I have an "83" Johnson 15hp. The kill button didnt work. I tested it out with an ohm meter and tested bad. I replaced the button with a new OMC stop button and still wont kill the motor? Where else can I turn to find the problem? I noticed the kill switch wire goes to...
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    18hp Mecury Long to Short shaft

    Can anyone tell me if a mid 80 Can anyone tell me if a mid 80's 18hp Merc long shaft be easily converted to a short shaft? Is it an expensive swap if I can find the parts fairly cheap? Or is it even possible at all? Thanks.
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    87 Evinrude 15hp Miss

    "I have develpoed a miss at op "I have develpoed a miss at opening throttle on my 15hp. Seems to idle ok, but misses untill full throttle then a dont feel or hear the miss anymore? Using the correct Champion plugs and new. Maybe a coil weakening? or timing or maybe a fuel problem? Any ideas...
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    JohnsonEvinrude 15hp Long to Short shaft

    "I have a 1994 15hp Johnson an "I have a 1994 15hp Johnson and also a 1983 15hp Johnson. Both long shaft. I would like to find out what is needed to change them both to short shaft? The driveshaft, for one, I understand I will need a 15" for both. What else? The water tube? Shift rod? Thank you...
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    Evinrude 15hp to Electric start

    "Could anyone tell me if I can "Could anyone tell me if I can swap electrics from an 1983 Johnson 15hp w/electric start to my 1987 evinrude 15hp, manual start? The donar Johnson ,I believe also has charging because of the rectifier I see.But thats only a guess. The fuel pumps may need swaping...
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    Evinrude 1987 15hp oily plugs

    "My 87 Evinrude 15hp I just bo "My 87 Evinrude 15hp I just bought, seems to keep the plugs oily, even after warm up. Compression is at 100# top and 105# bottom. Also seems to be running cold. I waited for it to warm before checking compression and it really never warmed much. Block stayed...
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    Mariner 99

    Am I correct in the fact that Am I correct in the fact that my mariner 9.9 I just purchased is a Yamaha? Ser # 682 CL 313941. So Mecury parts or manuals dont apply? Do I treat it as a true Yamaha? Any idea of the model year? Thanks
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    Mariner 99 ser number breakdown

    "Ok now that I bought a 9.9 Ma "Ok now that I bought a 9.9 Mariner I want to verify the year etc, but these Merc numbers are a bit confusing. I see this question alot but I will ask once again!! Can you help with my make and year? Serial# 682 CL313941. It evidently is a Japanese model not a...
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    MercuryMariner 99 to 15hp

    "I have a 1995 mariner 9.9, ca "I have a 1995 mariner 9.9, can I swap the powerhead with a used one of a 15hp merc or mariner. How are they different? Are the mercs compatible with mariner? Im just learning how they work. Im sure the carb may be different. Any big differences if I should find a...
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    Mariner 99 gearcase swap

    Just purchased a 95 Mariner 9. Just purchased a 95 Mariner 9.9. Its a long shaft but I really need a short. Is it possible to change the lower unit to short? Its fairly easy on OMC motors. This possible without major headaches? Thanks
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