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#71
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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.
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#72
01-25-2009, 05:40 PM
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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.
Last edited by bigshrimpin; 01-25-2009 at 05:47 PM.
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#74
01-25-2009, 07:37 PM
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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.
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#75
01-25-2009, 07:55 PM
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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.
Last edited by bigshrimpin; 01-25-2009 at 10:24 PM.
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#76
01-25-2009, 08:24 PM
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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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#77
01-26-2009, 08:40 AM
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Quote:
That's the same i was thinking MJ some people never learn to remove oil injection. He might learn after this one MJ but who knows.  
__________________
 1978 V20 Cuddy w/ 225 Johnson. And Several other boat's
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