Question for the four stroke guys?

Guess i have the smallest 4-stroke thus far . A 25 ele.start yamaha . Take the good with the bad . Quiet and no mixing oil/gas for the four stroke. Heavier ,cost more is the down side of the four stroke . Forget the old four strokes that were sluggish on hole shot . The new ones will change your mind . Actually looked for a good used motor (2 stroke ) but was afraid of the ones i found . At this point i would not go back . This thing falls apart then it will be a different tune at these prices . The etec would have been a possible choice but mississippi only has two dealers and neither within driving distance for me .

talltimber,,, the making oil comment has me confussed,,, will you explain to the novice 4stroke guy... I just got a 60 efi 4/ so far so good, quiet, hole shot is not what I expected, but hey I am hardly ever in a hurry,,,

Beagle,

I'm not talltimber but here's what I reasearched on it,,,,,,

Water vapor enters the crankcase of all motors from the atmosphere, and as a by-product of combustion. In other motors, the oil gets rather hot and any water vapor that may condense will steam-off and exit the crankcase breather. 4-stroke outboard motor oil doesn't get nearly as hot, so the water just keeps on collecting.

Check oil level and if it gets overfull this is the reason.

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Originally Posted by beagle man

talltimber,,, the making oil comment has me confussed,,, will you explain to the novice 4stroke guy... I just got a 60 efi 4/ so far so good, quiet, hole shot is not what I expected, but hey I am hardly ever in a hurry,,,

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Beagle,

In order to break in a new four stroke you must follow your manuals instructions and get the motor hot. I have heard the saying run it like you stole it more then once during break in. I am no expert but this is what I understanding from reading about four strokes making oil. Making oil is when gas is washing down the cylinders and being recaptured in the oil return and mixing with your oil, thus the level in the oil tank is actually rising because of the gas mixing in with the oil. I have not read a lot about Mercury having this problem but it seems to be a common problem with the Yamaha SHO motor. You should keep a close watch on your oil level to insure you are not having this problem.

Making oil.....is caused by carbon build up caused from doing a lot of idleing or slow running.....thats why they say to run the snot out of it everyonce in awhile. What happens is carbon builds up around the piston rings and the rings stick and let some gas bypass into the crank case or oil sump.....it gives you a higher reading on the dip stick. If you follow the manufacturers instructions and mix Ring Free at one ounce per ten gallons of gas you will never have this problem. Ring Free is made by Yamaha ......you can get it at any Yamaha dealer and most auto parts stores also have it.

So if it's prompted by carbon build up why does it occur in a new engine?

Well, I'm a one stroke kinda guy. Just ask my wife.

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Originally Posted by bwillaub

Well, I'm a one stroke kinda guy. Just ask my wife.

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Uhh, I could laugh like heck at that. Rofl