Engine Trouble

Well I am back online. Hung the Yamaha yesterday and spent today finishing up the install. All new steering, controls and tach/harness. Only issue was the oil tank hose was 18" short :( so I have the tank sitting on the deck for now, not under the passenger seat where it should be. Took her for a test drive and with 2 POB and full fuel trimmed down I was 5100 RPM's and trimmed out I maxed at 5600 RPM's so I think that the prop is just right. Thanks for all the help looking for motors and walking me through this.

-Svence
 
Yes I am going to chance it. Although the yamaha system is a hell of a lot more reliable and there are a couple of stages of alarms. The oil tank has an electric pump that only cycles on when the reserve on the engine asks it to and if it doesn't for some reason it alarms. When the remote tank gets low (say 1/4) the reserve won't refill automatically, it alarms and tells you to manually (hit a switch under the cowling) fill the reserve, showing you exactly how much oil you have left. It has enough oil in the remote tank at this time to do that twice. And finally when the remote tank runs dry and the reserve on the motor gets down to 1/3 it alarms and cuts the motor to 1500 RPM's. I am hoping that by the third alarm I know to put oil in!

-Svence

And pics are out for now, the boat is covered and put away as I am not going to be able to use it for a couple of weeks.
 
If your going to go with the oil injection on it, I would replace that float in the engine mounted tank. If it goes out NONE of your alarms will work. The YAMAHA system has no warning for no oil flow, just simply low oil level in that engine mounted tank. That float switch is the key to all of it. I will admit that the YAMAHA system is known to be a good one, but the float has also been known to be a problem.
 
csvencer said:
Well I am back online. Hung the Yamaha yesterday and spent today finishing up the install. All new steering, controls and tach/harness. Only issue was the oil tank hose was 18" short :( so I have the tank sitting on the deck for now, not under the passenger seat where it should be. Took her for a test drive and with 2 POB and full fuel trimmed down I was 5100 RPM's and trimmed out I maxed at 5600 RPM's so I think that the prop is just right. Thanks for all the help looking for motors and walking me through this.

-Svence
Click to expand...

Chris,

i'm glad to hear you got it on and everything is up and running again. thanks for the props again, i have been looking for a spare for a while. on a side note.. i got to look at my enclosure yesterday and the repair shop and start my engine, but the enclosure is coming together and i'm very pleased with it. should have the boat back in 2 weeks is what i was told.

anyway if you ever need any help or a fishing buddy give me a shout because i can be there in 15 minutes for anything. talk to you later, Paul
 
biggest thing you need to watch on the Yamaha oil system is teh hoses from the pump to the intake, make sure those hoses are in good condition and the connections are good. Clean the oil tank while you have it out, get all the old crud out of it. As far as the float switches go, I haven't seen to many problems with them other than crud sticking the float. The tank on the engine has a float switch also, good thing is if the switches go bad, they default to low oil condiditons, reducing rpm till its fixed. BTW, the oil level indicators on the digital guage is miss leading. When its in the green area, you are full of oil, when you hit the yellow or mid way indicator, you need to add oil, that indicator tells you when the resevoir in the boat is low(it also turns the transfer pump off till oil level is restored), not half out of oil. When the indicator gets to the low side(or red) the tank on the engine is too low(last chance) and the rpm limit should kick in. You can use the manual transfer switch to transfer oil from the boat resevoir to the engine resevoir to get you going again, but its not going to last long. If you run it low enough to kick in the rpm limit, you will have to cycle the key, and or manually transfer enough oil to the engine resevoir for the transfer pump to kick back in.
 
Hey Spares - Did Yamaha ever add oil injection on their commercial line of motors? I almost 100% sure they didn't at least up through 1998.
 
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to be honest with you, I don't think I have every run across a comercial rated Yamaha. ALl the law enforcement around here run Salt Water Series. There may have been some non oil injected ones that were continuations of the Yamaha/Mariner engines, but I haven't seen one. People around here believe no fault in yamaha engines, if you ask most of them, they will tell they never break and you don't have to work on them. They get a bit nervious when I get the rosebud out to change a water pump. The japanese engines have better paint, but they corrode inside worse than the american motors.
 
What's the "rosebud"? :) just kidding . . . I have had to use Acetylene to remove some stubborn nuts. I imagine it would scare the Be-jesus out of some folks. I looked a couple of boats with either 115c or 130c commercial motors . . . I'm pretty sure they were 1996 engines and I was surprised (well not really) to here from the original owner that they didn't come with oil injection. I'm pretty sure OMC's line of commercial line of outboards didn't have oil injection either.
 
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I learned the hard way about Yamaha lower units, there is a reason they are so much cheaper than Mercs. Any time you take anything apart on them, break out the red wrench
 
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