What do you do if you didn't winterize your outboard motor?

Question

Got a Yamaha two-stroke 25 HP outboard motor from my brother and he told me he did not winterize the motor at the end of last year.

Also he said that the last time he used it the motor could troll okay, but when he went to give it gas to go fast it would sputter and he would have to return to trolling speed. What could be causing that?

Answer 1

IF the motor was not winterised do it soon, changing the gear oil is a must.

By changing the gear oil you will remove any metal filings which may occur during normal operation, this will also remove any water too which could freeze and crack the gear case.

You're top end speed problem is due to either water in the fuel or c**p stuck in the high speed jet.

To fix this your going to have to remove all old gas from the tank line and carburetor, to clean the carb your going to have to take it off and have it cleaned out properly.

If you don't know how to rebuild the carb take to your shop.

P.S. Put new spark plugs in also make sure there gaped properly.

Good luck and happy boating.

Answer 2

probably the carbs are dirty   have water in them  thanks to the new fuel the gov, forced on us    it wasnt winterized dont worry it will be ok  the oil in the gas coats the interior

Answer 3

Clean your fuel system tank and carb, and filters.

Answer 4

There is not much you can do about the winterization problem.  If you are comfortable taking the intake off, you can get a look at the crankcase to see if there is any rust in the low end.  If you are going to do that, though, you will need to get a new set of gaskets.  I would just run it with a little richer mix for the first ten gallons.

as for the other problem, I would need to know if it is carbureted or fuel injected.  If it is carburated, my first guess would be water in the fuel system.  this is easy enough to troubleshoot.  There is a product called Kolor Kut that changes color in the presence of water.  You should check the fuel tank first.  If there is no water there, then try draining the carburetors.  There should be a small pastic hose coming off the bowl of the carb.  Open the valve it is connected to and drain it into a container and inspect that fuel.  If you find water anywhere in the fuel system you will need to find a way to get rid of it.  Usually draining the system and running fresh fuel through it will solve the problem.  Some times you have to start disassembling the carburetors to get the water completely out of the bowls.  If this is the case, you will want to thoroughly clean and inspect the valve bodies for sediment and buildup from bad fuel.  I would personally do this if the engine has gone more than three months without being started.  You would be surprised at what you can find in a carburetor that has set for a long time.

Answer 5

On an outboard you should not have the cracking problem you have in I/O's. That water should drain out just by being upright. To get ready for the season, change the lower unit gear lube, and change the plugs. The impeller may need to be changed if you engine is heating up and you don't see the little tell-tale spitting water.

Now to your problem. Sounds like a fuel problem. First, check all the filters. On the gas tank, inline if there is one, and the screen on the engine. Next, are you using a portable tank, make sure that vent is open on the top. OK, still not getting gas? Could be bad fuel pump, draws enough to idle, but not enough for higher RPM's.

Best of luck.