Just got my hands on a new to me 2007 Yamaha 90hp two stroke that is oil injected. Should I leave it factory or take it off and mix it myself?
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Just got my hands on a new to me 2007 Yamaha 90hp two stroke that is oil injected. Should I leave it factory or take it off and mix it myself?
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good question ,I like to know that my shelf ,I have a 50 hp I though about that too
I run a 2007 175 hpdi with the oiler and never had any problem. I use the Mercury semi synthetic oil. They are reliable and should cause no problems. I do not like the hassle of mixing oil and gas
I had a 94 Merc that I ran for 23 years until I upgraded last summer. Never had a bit of a problem with the oiler.
Nware14 , my only problem is the warning buzzer doesn’t work , not sure how to check out the problem?
Is it the wiring or the butter ? I was told maybe the reservoir float .
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Unhooked mine many years ago on a 150 Johnson. I don't trust the warning system to let you know quick enough. To me what's the difference in pouring oil in the fuel tank or an oil reservoir. When I mix my own I know motor is lubricated. Walmart and parts places carry a jug that holds a quart of oil and is marked in ounces . I will take my chances on me and not a sensor.
I had a '84 70hp Yammy on a 15.5' fiberglass boat, and I ran it like I stole it for most of the 15yrs I owned it ... never a problem with the oil injection system. In fact, the boat gave out long before the motor (according to the guy I sold it to).
I'm currently running a 1999 90hp Merc with oil injection and did run low on oil a few years back ... sensor alarm went off & I idled in & got oil & went on about my business. I now carry a gal jug of oil in the boat, but also check the reservoir every couple of trips. The motor may be a 1999 model, but it doesn't have many hours on it, even though I'm the 3rd owner. With that in mind, I have confidence that the injection system will perform as intended, for many years to come. Well, that and the fact that I locked up a 50hp motor many decades ago, by "thinking" (incorrectly) that the gas in the tank had the appropriate amount of oil mixed in. I just trust the oiling system & alarm system more than I trust my memory or my calculations (when adding gas to a built-in tank).
But, that's just me ... and I do know that a lot of people have removed the oiling system & manually mixed, and been fine with the results. Although, I do seem to remember that many of those folks were running Johnson/Evinrude VRO motors. And even OMC discontinued the VRO system & went to the OMS after so many reports of issues with the VRO system.
My warning buzzer died on mine. Had it replaced, wasn't very expensive.Quote:
Originally Posted by Zman
which are gravity fed and which have pumps ? Are most 40 gravity fed ?
My 86 40hp johnson vro has been bypassed and i mix my own fuelQuote:
Originally Posted by CrappiePappy
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My 2007 hpdi manual states to never premix oil. Better to do more research on Yamaha.
of course it does, with an auto oiler if you do you'll have way too much oil going to the motor. Disconnect the oiler and you'd better mix oil and gas.Quote:
Originally Posted by glasscat
Some Yamahas direct oil into crankcase and use special designed rings for upper oiling. I still say it is better to research, than just assume premix is sufficient.
I trust my oiler on my Mercury 115. Alarm test at every key start confirms buzzer.
Not to hijack, but I add a small amount of TCW3 2 Stroke Oil directly to my fuel to help with lube and conditioning of the fuel tank and system in addition to reducing the harm of ethanol in the gas. I also do that for my motorcycle and lawn equipment, all at 1 ounce of TCW3 oil to every 5 gallons of gas, somewhere around a 640 to 1 mix. Been doing this for a couple of years now.
Looks like it worked for 10 years so far. Had the same motor once. Never a problem.Quote:
Originally Posted by nware14