You want to be able to move the points, but you need the screws tight enough to hold that points from moving when you don't want them to. Loosen the screws that attach the points, but not very much. If it sticks on the crankshaft, a small tap with the hammer will pop it back off (you don't need to us the nut for this light tap). You can set the flywheel back lightly on the crankshaft to turn it. Turn the crankshaft until the rubbing block on the points sits on top of one of these bumps. You can see the small bumps on the cam that opens the points. You should find the points open twice for each revolution of the crankshaft (once for each cylinder). Get a "point file", they are cheep.Īfter the points are filed, turn the flywheel until the points are wide open.
![gas oil ratio 1971 5 hp sears boat motor gas oil ratio 1971 5 hp sears boat motor](https://i.ytimg.com/vi/LmZT3KJgm2c/maxresdefault.jpg)
![gas oil ratio 1971 5 hp sears boat motor gas oil ratio 1971 5 hp sears boat motor](https://i.ytimg.com/vi/GNwIxEj_NJU/hqdefault.jpg)
If you don't replace them then you really need to file them.
![gas oil ratio 1971 5 hp sears boat motor gas oil ratio 1971 5 hp sears boat motor](https://usermanual.wiki/Craftsman/225582590.588813464/asset-e.png)
OK, now that you reached the points, I recommend that you replace them with a new set. If you just keep cranking on the wheel puller without tapping with a hammer, you will probably bend or break the flywheel before it comes off. You tighten the wheel puller up tight and then strike the top of the puller with the hammer. Note, in the unlikely case that you have a wheel puller, you should still use a hammer. :) Please don't blame me if you break something. I highly recommend a wheel puller, but I know your not going to go out and buy one for a 35 year old outboard. Don't loose the small key that indexes the flywheel to the crankshaft.ĬAUTION - Even when done correctly, I can't promise the hammer method won't damage any thing. If the nut is too high, then the nut will be badly damaged. If the nut is too low, then the crankshaft end will be badly damaged. Did the flywheel pop loose? No, then you must hit it harder! This is where having the nut flush with the top of the crankshaft is very important. If you hit it crooked, you will damage the crankshaft and nut more. Try real hard to have the hammer hit the crankshaft flat and in the center. Now whack the top of the crankshaft with a hammer.
Gas oil ratio 1971 5 hp sears boat motor driver#
Use your screw driver to pry up lightly under the flywheel. Oh, you don't have a wheel puller big enough to do this? :) OK, then do this. Now use a wheel puller to remove the flywheel. If the nut is flush with the top of the crank shaft and there is no gap under the nut, then do this: Remove the nut and take off the washer that is under it and then put the nut back on - flush with the top of the crankshaft. Leaving the nut on will help keep you from damaging the end of the crankshaft. Loosen the nut until the nut is flush with the top of the crankshaft. Having a second person to hold the screwdriver makes this a lot easier. Use a socket wrench to loosen the nut in the center of the flywheel (you usually cannot get anything but a socket wrench on this nut because the nut is recessed in the flywheel). MAKE SURE YOU FIND A STRONG PLACE TO BRACE THE SCREWDRIVER OR YOU CAN BREAK SOMETHING. To remove the flywheel, use a large screwdriver braced against a strong point on the engine block to keep the flywheel from turning. If the flywheel doesn't have access holes, then you must remove the flywheel. If you are real lucky, the flywheel will have holes in the top that you can reach the points through (but I doubt that year does). They are under the flywheel on the top of the engine. With the new fuel mixture with ethanol- moisture and more water is intrained in todays fuel more than ever and can make deposits and jelling in various parts of that system.Ĭlean out the old- Put in the new - and tweak it as necessary.First find the points on the engine. I always before leaving the water on O/B's - disconect the fuel supply and run till empty- then atttemt several restarts. Take the carburator off and clean all the varnish from the bowl and jets. If it idles roufgh in gear or at mid to wide open throttle. It will stall but not to the point of kill. While running spray some carb cleaner down it.
![gas oil ratio 1971 5 hp sears boat motor gas oil ratio 1971 5 hp sears boat motor](https://i.ytimg.com/vi/0R7NrT6hJyA/maxresdefault.jpg)
A preaty simple fix on a motor that size. If not- the impeller for cooling water may not be working. When started and running there should be a "tattle tail" of water exiting the engine in view to show of cooling. Mount the motor on a boat or make a 2x4 frame and place the lower unit in a 5 gallon water bucket. :smiley_rotflmao: ) Put new in with correct oil mixture. Just clean the carbon off.Įmpty the old gas (don't ask me how. If they are not rounded off at all- I would keep them. Pull the plugs and take a look at them- tell us what they look like or take pic's of them.