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boat motor question #10063588 06/14/14 09:49 PM
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shadrap Offline OP
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i have a 93 evinrude 150 v6. it runs great on plane, about 25mph is all i need to go. will easily go faster no problem no smoke but if go slower especially around 3 to 5 mph. it will make a sneezing type sound and die. it will continue to do this over and over. i have to continually restart it and man does it smoke. it smokes at these lower speeds even when it is warmed up. and man does it use a lot of oil. i do not put the oil in the gas manually. it is done with the oil reservoir. i will really play close attention next time i take the boat out and see how much oil i use per # of miles. use of gas is fine. but for sure it uses a lot of oil and smokes a lot but not a higher speeds, and at higher speeds it runs great. does anyone have any thoughts how to help this problem?

Re: boat motor question [Re: shadrap] #10063603 06/14/14 10:02 PM
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Jacob Offline
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Stuck float?


Re: boat motor question [Re: Jacob] #10063786 06/14/14 11:58 PM
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shadrap Offline OP
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is the float in the oil reservoir?

Re: boat motor question [Re: shadrap] #10063902 06/15/14 01:07 AM
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Demfishes Offline
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You may want to check your oil reservoir cap to see if it's sealing so that you get the correct amount of pressure.. it does sound like you are getting a ton of oil in the mix at low rpm

Re: boat motor question [Re: shadrap] #10064446 06/15/14 11:54 AM
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Ketchn Offline
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my 85 Johnson motor smokes a bit at low rpm ...pre mixed fuel
my buds said its cause its old bang
i do know she is a bit ruff on the idle when she is cold
but after a second or 3 ....she idles like a sewing machine and then ....
go lil zebras go .... rolfmao
btw ,,,,they disconnected my oil injection system after it burned up the motor before i got her
the thing that comes to mind with me ....if it puts to much oil in NO biggeeee
if it puts NOT enough ....BIG problem
i would watch that thing like a hawk there sir .... thumb

Re: boat motor question [Re: shadrap] #10064566 06/15/14 01:19 PM
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Jeff_W Offline
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Im with Ketchn .... I would block off the oil injection and pre-mix it. Will probobly solve your problem and give you peace of mind!

Re: boat motor question [Re: shadrap] #10064654 06/15/14 02:08 PM
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fishing den Offline
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sounds like your vro pump is having proplems. you can put it in the shop and who knows what they will charge. you probley need a new pump ect, I think i would disconect it and start premixing 50:1 oil with gas. the disconect is pretty simple a couple plugs to undo and cap oil lines you should be ok then. Shadrap youu need to talk to your neighbor!! thumb


living for that next thump
Re: boat motor question [Re: shadrap] #10064936 06/15/14 04:21 PM
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fishing den Offline
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if you will put a new set of plugs in it that will fix your idleing and low speed dieing. hammer

Last edited by fishing den; 06/15/14 04:29 PM.

living for that next thump
Re: boat motor question [Re: shadrap] #10064994 06/15/14 04:59 PM
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SlabHappy Offline
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Sounds like I have about the same problem on my 94 Merc 115. It dies sometimes at low idle, and a lot of times when you put it in gear. I was thinking maybe I needed a carb job. I have recently put new plugs and a fuel filter in. I know the oil reservoir doesn't seal on top, it you fill it and trim the motor up, it spills. Do you think disconnecting the oil and pre-mixing would fix it?

Re: boat motor question [Re: shadrap] #10066080 06/16/14 02:48 AM
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Spiderman Offline
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I did that with mine about 5 years ago. I have an Evinrude 94 model 150hp.

Seems like the vro pump was $300.00 so I just blocked it off & premix my gas.


The Truth is six of the seven Dwarfs are not Happy!
Re: boat motor question [Re: shadrap] #10066419 06/16/14 11:12 AM
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AggieKenny Offline
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They smoke at low speeds because pre mix ratios are intended for WOT. Sounds like carb jobs may be in order.

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