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  1. M

    15 HP Mercury 4-Stroke water in oil

    I have a salvaged 2006 Mercury 15 HP 4-Stroke Outboard. It is a victim of Hurricane Ian. Was under water for 1-2 months?? Went through the usual save the motor stuff. Has 115 PSI compression on a warm engine. Good spark. Starts right up buttttttt water is getting into the oil. Drained and...
  2. M

    Yamaha 9.9 HP 4-Stroke water in oil

    Trying to bring back to life a 1993 Yamaha 9.9 HP 4-Stroke that has water in the oil. Been sitting unused for years. I can get it to run but not too good. Sounds like it is running on 1 cylinder. Top cylinder has 140 PSI. Bottom cylinder 75 PSI. Drained the old oil in it and put in new and it...
  3. M

    Yamaha 9.9 HP 4-Stroke lower unit

    Trying to resurrect an old 1993 Yamaha 9.9 Sailboat motor. It is leaking through the propeller shaft and thus I need to remove the lower casing cap. Removed the 2 bolts holing it in but need help in getting it OUT. Is there a trick? Heat? Soaking in vinegar? Try turning it with vice grips...
  4. M

    6 HP Tohatsu 4-Stroke Driveshaft binding

    I have a 2012 Tohatsu Long Shaft Sailboat motor that has a severe binding issue. You can't pull the start cord with the spark plug out and lower unit removed. I can turn it with a wrench on top with difficulty. Thus, I removed the power head, then cylinder head. Cylinder head and piston...
  5. M

    Yamaha 9.9 4-Stroke with no spark

    Picked up a 1997 T9.9 ELHV knowing it did not run. Trying to resurrect it from the dead. It "looks" nice and clean and well cared for, but no spark at all. Checked the neutral, stop and safety switches and all work. When I spin the motor with a rope (Spark plugs out) do not get any voltage...
  6. M

    Yamaha 15 HP 4-Stroke low compression and water in oil

    I have a 2005 Yamaha 15 HP 4-Stroke that has low compression (85 PSI, 95 PSI) on both cylinders and the oil is milky looking. Lack of power at higher RPM's. Bad head gasket? Is this common with this motor (F15ESH)? How hard is it to replace? Need any special tools? Thanks
  7. M

    Yamaha f115 4 stroke running bad

    2003 Yamaha F115 barely running. It starts fine and will run OK if under 1500 RPM but will not go when you push the throttle. It stammers and misses. Went to a portable gas tank with new gas and that did not help. Gas is not the issue. It will also start to buck and run rough at 1000 rpm...
  8. M

    15hp nissan 2-stroke no run

    Picked up a '98 14 HP Nissan 2-Stroke (NS15D2). Very clean motor. No salt corrosion. Tore the carb apart (it was spotless) and put in new bowl gasket and carb O ring and cleaned it out. Looks like the motor has not been run in years. The bowl gasket was brittle and in pieces. Good...
  9. M

    Nissan 9.8 2-stroke driveshaft bearing

    I need to replace the driveshaft bearing (the one just below the impeller and oil seal). Don't know if it goes on from the top or bottom. It "looks" to me like it goes in from the top, but not sure??? I was planning on heating the new bearing and freezing the shaft to make it go on more easy...
  10. M

    Nissan NS8B only running on 1 cylinder

    I have a NS8B that only runs on the top cylinder. Bought it to fix it up and resell, but now probably just for parts because of many "issues". Bought and sold 20 of these small HP motors in the last 10 years but this one has me puzzled. The motor starts up in 2 or 3 pulls but runs rough and...
  11. M

    Blue spray paint for Nissan 2 Stroke

    Have a Nissan NS5B that needs to be repainted. Looked but cannot find where to get the Metallic Cobalt Blue spray paint to touch it up. Usually I can find it in a Moeller can, but not this time. Help...........
  12. M

    1950 FIRESTONE 3.6HP LOWER UNIT SEAL AND GREASE?

    I picket up a nice 1950 -1955 vintage Firestone 3.6 motor. Ordered a new decal and stripping off all the old paint. All seems to be fine mechanically except I need a gasket for the take-apart lower unit and not sure about what grease to use in the lower unit. Any help would be...
  13. M

    Hard starting 7.5 hp 2 stroke

    I have an 84 7.5 hp Merc 2 stroke that is hard to start. I have taken off the carb 4 times....soaked it, cleaned it, rebuilt the fuel pump, put a new carb to block gasket on, new needle valve. New plugs. After I get it started it runs great and will continue to restart on the first pull...
  14. M

    Old 20hp merc sputters at idle

    I recently picked up a nice old 1974 20HP Merc. It has 110 PSI on both cylinders, and looks very clean and underused. Great spark. I took off the carb, took it all apart and cleaned it, although it was very clean already. Reset the float a little. All "looked" good. Checked the high speed...
  15. M

    94 200 hp yamaha ran out of oil

    :( I did the unthinkable. Ran my Yamaha out of oil. There was plenty of oil in the boat reservoir but it did not pump into my motor reservoir. No alarms went off, the motor just suddenly dropped down to idle. I shut it off right away and added oil to the motor tank. It started up but was...
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