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    78 Evinrude 9.9

    Sounds like it is running normal to me. The way that motor works is as the RPMs increase the amount of water pressure from the pump increases. As that happens the direction of the flow out the exhaust relief hole changes. At the beginning, one is lucky to feel a mist because the T-stat...
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    78 Evinrude 9.9

    If I went to all the trouble to look at the impeller and I had a new one already I would certainly not use the old one. The impeller in the picture looks in pretty good shape but remember impellers need to be changed when they are still operational. If you wait until they fail you will...
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    83 Johnson 9.9 slipping

    Possibly, when the impeller was last changed the person re-connecting the shift rod, before pushing the lower unit back up, might have not have allowed the groove of the shift rod to fully get below the connecting screw. If you get to the point of dropping the lower unit, take a close look at...
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    1975 15 hp evinrude 15504C warms up then dies

    Motor sounds good. The problem with the fuel pump scenario being your original problem, is why did it not attempt to start when you used starting fluid? The starting fluid is to rule out fuel problems if it still does not attempt to start. Perhaps the starting fluid did not make it all the...
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    1975 15 hp evinrude 15504C warms up then dies

    If you checked spark and it was good and also sprayed starting fluid in it (I assume right into the cylinder holes) and got nothing then it is either bad compression or your spark plugs are no good or the timing of the spark has shifted. The only failure I can think of where spark on both...
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    Can't Get LU to drop down on 1976 15Hp Evinrude

    The motor was working fine when I put it into the shed about 3 years ago. As I said, the shaft was probably like that when I changed the impeller the last time, 8 or so years ago. I will at least look at the driveshaft on the other motor to see if it is in better shape, since that is what that...
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    Can't Get LU to drop down on 1976 15Hp Evinrude

    I was afraid of that. Well I will take a look at the crankshaft splines on the 15Hp and maybe they will look OK. If not, I will probably switch the entire 9.9Hp powerhead over to the 15 and then switch the carburetors and hopefully end up with a good motor. The 9.9Hp does not have any upper...
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    Can't Get LU to drop down on 1976 15Hp Evinrude

    The drive shaft might have been like that the last time I changed the impeller. I might not have noticed it. I do have a parts motor (1975 9.9Hp) so I will look at that drive shaft. I imagine it should be OK but we will have to see. I guess I should remove the 15Hp powerhead and look at the...
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    Can't Get LU to drop down on 1976 15Hp Evinrude

    The was an O-ring on there that I removed before I took the pictures. As for grease, I think I used marine grease (used on propeller shafts) on those splines the last time I changed an impeller. I did not have any moly lube. Would that make a difference?
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    Can't Get LU to drop down on 1976 15Hp Evinrude

    Thank you. More force got it down. Now I am having another concern. Do the splines on this drive shaft look normal. The outer splines seem to have a well defined machined line on one side and then becomes jagged on the other side. All 4 outer splines seem to be like this. I would have...
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    Can't Get LU to drop down on 1976 15Hp Evinrude

    So I am in the process of changing the impeller on my outboard. I have the 6 bolts off on the LU and I have removed the top screw on the shift rod. The LU does not want to drop down completely. It is in the 1/2 inch down position. The shift rod moves out of the connector when I move the...
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    74-76 - 9.9/15HP - Setting Timing when Flywheel has Multiple Marks

    I have done that multiple times and each and every time after completion I would check the point gaps after and they were always bang on 0.020". I now just set them to 0.020" and run with it. Never had a problem.
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    1976 EVINRUDE 9.9 NEW WATER PUMP DOESN'T WORK

    Also, those models (1974 to 1976) don't shoot much water out the back until the motor warms up and the T-stat starts to open. Usually just a fine mist out the back hole for the first 20 or 30 seconds or so.
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    Wood for boat Transom

    I need to do a much needed repair to the wood transom on my Springbok 14' aluminum boat. Just the wood on the inside of the boat. I know they say not to use the green pressure treated wood because it is supposed to accelerate rusting of the boat. I am wondering if Cedar would be OK or perhaps...
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    1976 Evinrude 15 Questions

    You can make a spark tester also.
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    1976 Evinrude 15 Questions

    If you can't find a proper strap wrench you can make one using some nylon strapping material and a strong thick piece of wood. I have also used electrical extension cord instead of nylon strapping that worked quite well.
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    Gear Oil - Multipurpose Outboard Oil

    I picked up some gear oil for my 1976 15Hp motor and 1961 5.5Hp motor. The oil says it is for "all outboard gear oil applications requiring SAE 80, SAE 85, SAE 90 and OMC type C". I have heard that one should not use regular oil for a LU specifying type C oil, but can one use an oil that works...
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    Extra play in throttle grip of 1975 9.9Hp Evinrude

    My throttle grip has quite a bit of excess play, in my opinion. You can turn the twist grip almost 1/2 an inch before the throttle cam, under the magneto, even starts to move. It has a similar play in the both directions. The play seems to be reduced a little when the motor is running but is...
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    Molylube Alternative

    I only use a little dab of this stuff on the driveshaft splines of my 1976 15Hp motor. I got some when I ordered a water pump kit many years ago but have since used up that little supply. Any idea where to get this stuff. Is there a permatex substitute or any other brand name. I suspect it...
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    1975 9.9HP and 1976 15Hp Lower Unit Interchange

    I own both of the motors above and have decided to take the powerhead from the '76 15Hp and put it on the mid-section of the '75 9.9Hp since my 15HP has some useless motor mounts. The head bobs around quite a lot and the 9.9Hp seems to be fine. I don't want to pay the very high price to replace...
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