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  1. M

    15 HP Mercury 4-Stroke water in oil

    I was thinking that the head gasket would be the most likely cause and it would be easy to repair. Agree or not???
  2. 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...
  3. M

    Yamaha 9.9 HP 4-Stroke water in oil

    Thanks .....................will do.
  4. 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...
  5. M

    Yamaha 9.9 HP 4-Stroke lower unit

    What is a dynamic hammer - inertial hammer? slang for beat on it??
  6. 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...
  7. M

    6 HP Tohatsu 4-Stroke Driveshaft binding

    Well, finally got the driveshaft out and separated from the crankshaft. Took some prying and lots of WD40 but "got er done". Destroyed part 47 in the process but I figured that would happen anyways. Now the driveshaft goes easy in and out of the crankshaft. Crank and all connected to it...
  8. M

    6 HP Tohatsu 4-Stroke Driveshaft binding

    Yes, I agree. What "I think" happened is that at one time the motor was submerged thus causing the salt inclusion to occur. I will continue to try to remove #47 and its contents but may end up cutting it off and buying a new #47 and all the contents, which I will have to buy anyways.
  9. M

    6 HP Tohatsu 4-Stroke Driveshaft binding

    Yes, I can put vise grips on the shaft and rotate 47 with another pair of vice grips but it is binding a lot. If I rotate the shaft with vice grips it and part 47 turn easy along with everything else. I was only able to pry up part 47 only 1/32 of an inch or so. Shot some WD40 on the shaft...
  10. M

    6 HP Tohatsu 4-Stroke Driveshaft binding

    That is correct. The driveshaft is stuck in part 47, and also stuck in the spline shaft of the crankshaft. Here is a pic of my predicament. :(
  11. M

    6 HP Tohatsu 4-Stroke Driveshaft binding

    The motor is a MFS6CS. It is a long shaft SailPro. When I received the motor the lower unit and spacer were already off the motor. The driveshaft was out of the lower unit and connected to the crankshaft. It does not want to come out of the power head???
  12. M

    6 HP Tohatsu 4-Stroke Driveshaft binding

    Thanks for your input. Yes, it was used it salt water. Might have been submerged at some point. Been putting a lot of WD40 on it to try to loosen. Will continue to work at it.
  13. 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...
  14. 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...
  15. 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
  16. 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...
  17. 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...
  18. 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...
  19. 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...
  20. 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...........
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