See full version: Water pickup tube Evinrude 15HP
So I got the pickup tube put back into place and the impeller was rotating in the correct direction. As far as the part you were talking about earlier. will this one work? Water Tube Grommet for Johnson, Evinrude, Johnson, Evinrude 315837, GLM 86494 - Sierra 18-3337 - iboats its only 1.74 from Iboats.com.
So before I get all my new parts bolted up I want to spray some zinc primer or paint on the base of the powerhead, the inside of the exhaust casing, as well as the new exhaust housing to make sure that any further corrosion at stopped. I want this engine to last for years to come. Is painting everything on the inside ok, or should I just leave it alone?
I don't think you can salvage that exhaust leg. Here are a couple of pics of the leg off a '92 15hp that I rebuilt. You can see that two of the corners of your leg are completely corroded away. The first corner holds the upper end of the water inlet tube. The other corner holds the end of a short tube that drops water coming out of the powerhead down inside the exhaust chamber in the middle outer leg.
The boat only has 3/4 plywood bench seats with foam under seats with 1/4 plywood covering foam sides. Boat Hull is 120-130lbs I checked it. I put the two 40lb batteries on the front seat to keep the bow down. I have the trim pin in the hole closest to the transom. I weigh 170lb and also have the trolling motor in rear. The Bow is not too low or diging in to the water.
Re: Evinrude 15HP will not Rev to WOT rpm low power
Did you do an external spark test to see if your ignition can supply the voltage so that your spark can jump a 3/8" gap? What spark plugs are you using and what are their gaps?
When you cleaned your carb did you use a new carb kit and install a new high speed oriface plug? Did you adjust the rich/lean adjustment of your carb for optimum gas/air mixture? This would probably effect idle more then WOT but the adjustment is easy to do.
Could be your upper/lower crankcase seals, although I would suspect one would go before the other and you would see some difference when running on one cylinder compared to only running on the other.
How did you set the timing? Also, have you tried adjusting the roller cam to touch the throttle cam a little sooner (arrow slightly to the left of the roller when looking straight on from the front of the motor) reducing your spark advance. Your plug pictures do not look all that bad but they might be showing a little pre-detonation or they could be showing a lean mixture or timing and mixture could be just right. Can't really be sure. Not a difficult test to run. more
Re: Evinrude 15HP will not Rev to WOT rpm low power
I have a notch in my throttle cam of my '76 15Hp motor, also. It is notched so smoothely it almost seemed like it was designed that way, but logic always told me it must be a defect of some sort. I have thought about using JB weld to create a smooth surface but I figured I might just make a mess of things and I doubt it is hurting my top end all that much. Probably explains your 90% open throttle as opposed to 100%. [links]
The 15 was notorious for fouling spark plugs, but that is not the case here. Again, if fouled, it wouldn't get 4800. more
Re: 1956 Evinrude 15 HP model #15016
I also noticed that the fiber rings on the screws looked old & worn. I replaced them with neoprene washers which are a nice snug fit. Thinking, that may be the oil leaked out there and allowed water in.
Didn't see any place on this sight for posting pic's. I'll add more over the next few days on their web sight. here
Re: 1956 Evinrude 15 HP model #15016 here
Is there any way of testing the fuel pump to see if its working?
Re: 15hp Evinrude Wont stay running more
Your fuel pump may be a bit weak to pull fuel that far or maybe it just needs replacing.