Yamaha 115 4stroke

[Robby73]

Im really new at boating. I have a Mako with a yamaha 4stroke 115 eng. Last time out an alarm started going iff. I figured it was low on oil but didnt know where on the eng to check. Got the boat home and after checking things out, found I was low on oil in the tank on the engine. I checked the main tank under the console and it was full. I found the little switch on the side of the eng thst said it would pump oil to the tank on the eng in an emergency. Well I hit the switch, with battery switch in and key in ignitionand it didnt appear to transfer oil. So anyone have any advice for trouble shooting the oil pumping system. By the way this a 2002 year eng.

 

[Faztbullet]

This is a 2 stroke engine not a 4 stroke and from description sound like a 90's year model. Post the model/serial plate info.

 

[mike_i]

If your setup is like my setup was on my old 2 stroke there should be a small pump on the side of the tank in the bilge (sub tank). It's a small square pump that's actually two gears that turn to move the oil. I would check the voltage at the pump while you flip the toggel switch on, you may have to have the key switch on but I'm not positive. There should also be a filter near the pump, you need to verify that it's not clogged. I always carried a couple of quarts of oil with me in case I ran into your situation and needed to get oil into the main tank. I agree with Faztbullet, you have a 2 stroke not 4.

 

[racerone]

Yes ---Sellers sometimes confuse 4 cylinder with 4 stroke.----Public perception is that 2 strokes are an inferior engine.----And 4 strokes are much easier to sell.----Many buyers have no clue as to how to spot / tell the difference either.

 

[Robby73]

I have to admit I was going by the number of cylinders. I guess I do have a 2 stroke instead of a 4 stroke. The model number on the engine is 115TLRA. I do have the tank on the side of the engine with another tank under the steering wheel. So I thought all 2 strokes had to have the oil mixed with the gas . I guess the oil pump on the side of the eng does this for you automatically or is suppose to huh. I will check out the voltage on the side of the tank. Any suggestions on a good manual to use to troubleshoot problems like this.
So a 4 stroke doesn't use oil in the gas . Do I have that right?
thanks guys

 

[CaptnKingfisher]

I have to admit I was going by the number of cylinders. I guess I do have a 2 stroke instead of a 4 stroke. The model number on the engine is 115TLRA. I do have the tank on the side of the engine with another tank under the steering wheel. So I thought all 2 strokes had to have the oil mixed with the gas . I guess the oil pump on the side of the eng does this for you automatically or is suppose to huh. I will check out the voltage on the side of the tank. Any suggestions on a good manual to use to troubleshoot problems like this.
So a 4 stroke doesn't use oil in the gas . Do I have that right?
thanks guys

The difference between 4 stroke and 2 stroke has to do with the amount of revolutions the engine makes to complete combustion. Plenty of great YouTube videos that will explain better thàn I could.

As far as your issue, like another poster said, turn on battery, turn on transfer pump and listen. Do you hear the pump? Test for voltage at the pump with switch on. If no power at the pump then you've got to troubleshoot a wiring problem. If 12v+ at the pump and it's not doing anything then replace the pump.

 

[99yam40]

the remote tank pump should have 12V+ with the key in the on position.
the e switch provides the negative/ ground so the pump can run just like the oil level float switch and oil control module.
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