Mariner/Yamaha help

[wiscoboater]

Hi Guys,
I picked up a Mariner, made by Yamaha.
Model #40ELO
Serial #433053
Code 6E9L
This motor says "Oil Injection" on the hood below the Mariner lettering. It has the fuel connector on the front of the motor. I have no oil tank for it. Can this motor be converted to run on 50:1 premix? I have seen this done with VRO systems, but this Mariner/Yamaha is new to me. Anyone have any experience with them?

Thanks,
Jeff

[fleetwin]

Hopefully a merc/Yamaha guy will chime in…But, I don’t think it is as easy to disable the oiling on this engine as it is for the OMC/VRO units. I think the oil pump will actually need to be removed, then the block port capped off. Electrical warning systems will have to be disconnected/disabled as well.

[wiscoboater]

Thanks Don,
Would this oil tank be under the motor hood, or a stand alone unit like a VRO.

[collectorinspector]

quote fleetwin:

Hopefully a merc/Yamaha guy will chime in…But, I don’t think it is as easy to disable the oiling on this engine as it is for the OMC/VRO units. I think the oil pump will actually need to be removed, then the block port capped off. Electrical warning systems will have to be disconnected/disabled as well.

This makes sense for this motor.

BnC

[billw]

Yamaha oil injection is fairly bullet proof, so in my world, disabling it just isn’t done. If it were my motor, I would get an oil tank off eBay and put it back together right. (Why is it missing?) That being said, if your oil pump is still on the motor, you can remove the oil pump, remove the worm shaft and reinstall the pump as a block off. See diagram link, below, reference #1.

http://www.marineengine.com/parts/marin … l/oil-pump

Here’s a link to a tank on eBay, for $35 with free shipping. This is an actual Mariner part but you can search Yamaha 40, too. Just make sure that you note the tank shape, as Yamaha has different shapes for different years.

http://www.ebay.com/itm/Mariner-40-HP-O … -Z&vxp=mtr

Long live American manufacturing!

[fleetwin]

OK, that makes sense, simply removing the worm drive then reinstalling the pump. This keeps all the oil lines intact eliminating the need to cap off the oiling nipples in the block. I would agree with Bill, probably not the best idea to disable this system, especially if users/fuelers might get confused assuming it is oil injected.
Does this engine have an engine mounted oil tank? If so, the unit is self contained and simple to deal with. If my memory serves me, I seem to remember the Yamahas having two oil tanks, a small one right near the oil pump, as well as a larger transfer tank mounted in the boat. Although some of them had a self contained oil tank under the engine hood, an oil fill cap coming through the engine hood would be evident if the self contained system is on your engine.
You will need to find a transfer tank if your system uses it, but more importantly a dry place in the boat to mount it. The one thing that fouls all of these oiling systems is water seeping into the remote oil tanks. So, I might agree with you about disabling the oiling system if there is no locker/dry place to mount the remote tank. A common example of this would be an open 13′ whaler, no dry place for the tank, and it is common for water to collect inside the boat.
Take some pictures of your engine, so Bill will be able to see what you have/need…

[billw]

Model-wise, his engine came up as a tiller 40. That has only the under-cowl tank…..That’s the one I sent the link to, on EBay.

Long live American manufacturing!

[wiscoboater]

Ok, here’s some pics of the motor. No under hood oil tank. I can not even see a place one would fit. I looked the motor over today and I can not even find a place where an oil line would come in or plug into from an external tank. This one has me scratching my head. Where would the oil line go? Side note: this is not a tiller motor. It has a set of controls. It came from the factory like this, was not converted from a tiller. It has no hole in the cowl for the oil fill. I’m assuming the oil line would enter into the intake manifold after the carbs….correct?

[Mumbles]

The original oil bucket and parts may have already been removed allowing the motor to run on premix. Here’s a diagram showing the oil lines hooking up to the carbs. Those guys across the big pond are pretty good at compacting lots of stuff into small places.

http://www.crowleymarine.com/mercury-ou … 44_130.cfm

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[wiscoboater]

Thanks Mumbles. So the mystery deepens…or is solved. Looking at that diagram, and the non injected diagram I’m notice something. The 2 oil lines coming from the pump lead to the tops of the carbs. Now, looking at the motor I have I can see the two bosses on the carbs where they would be drilled and tapped for the nipples the oil lines connect to. The bosses are blank. They were never drilled or tapped. Looking at the diagrams of the non injected motor the fuel pump and lines are identical. Everything looks factory. I believe what I have here is a non injected motor with the wrong hood or the wrong decals. I got the motor from a friend who got the motor at a storage unit auction. I have no history of it, and the serial number that appears 3 different places on the motor does not come up on Boats.net or Marinengin.com. I think I have a mutt here.

[Author]

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