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Old 28 April 2013, 08:46   #1
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90HP Mercury 2 stroke

Really sorry if this seems like a daft question. I have just upgraded to a Mercury 90HP 2 Stroke outboard, problem is I cannot seem to find a 2 stroke level indicator, when I open the flap on the top of the hood all I can see is a white plastic section which is for filling/ topping up.

On a seperate note the previous owner explained that the engine had an over sensitive oil level alarm, can this be replaced. I have read that there is sometimes a magnet on the bottom of the float arm that may be missing/ dislodged....

Any advice would be much appreciated.

Thanks
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Old 28 April 2013, 09:18   #2
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Originally Posted by Wee Dafty View Post
Really sorry if this seems like a daft question. I have just upgraded to a Mercury 90HP 2 Stroke outboard, problem is I cannot seem to find a 2 stroke level indicator, when I open the flap on the top of the hood all I can see is a white plastic section which is for filling/ topping up.

On a seperate note the previous owner explained that the engine had an over sensitive oil level alarm, can this be replaced. I have read that there is sometimes a magnet on the bottom of the float arm that may be missing/ dislodged....

Any advice would be much appreciated.

Thanks
How to check the oil level - take the cowl off and look at the tank.

Sensitive oil level sensor - they all are. Just keep the tank filled and it wont be sensitive. Also keep an eye on the seal at the top of the tank as it can dry and lead to leaking when it is tilted.

CJL
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Old 28 April 2013, 09:23   #3
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Thanks for your reply CJL,

Do you mean that when I open the cowl I should see a "puddle" of oil? Does this also mean that there is no actual level indicator?

Many thanks
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Old 28 April 2013, 09:29   #4
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Thanks for your reply CJL,

Do you mean that when I open the cowl I should see a "puddle" of oil? Does this also mean that there is no actual level indicator?

Many thanks
The tank for the 2 stoke oil on the side of the engine is semi-transparent so you can see the level of oil in the tank. Keep it at least 1/3 full and store a bottle onboard under a seat or something just in case. (See picture)

There is a low oil level alarm that can go off if your in the rough stuff as the oil starts sloshing around in the tank. This is probably why the vendor say's it is sensitive. As stated to combat this, keep the tank full and you won't have a sensitive oil level alarm anymore!

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Old 28 April 2013, 09:35   #5
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When you remove the cowl, you should be seeing something like this



so Mark I Eyeball is your actual gauge. The level indicator you refer to is more likely a "Low Warning" alarm. Best not test/rely on this. Keep her maxed on oil. The last owner probably meant that the alarm tended to go off prematurely - on say a half tank instead of a quarter. A lot of these systems do that. Unless it forces you into a "limp home" mode, it's not a big deal. I used to check oil levels after every tank full of fuel - that kept me right...
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Old 28 April 2013, 09:39   #6
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Thanks Wilk - I was trying to find a better picture and you beat me to it!



Chris
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Old 28 April 2013, 13:55   #7
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On a completely different note I purchased a mariner 90 2 stroke from this forum and am just getting around to fit it to my rib... Mine is a 1998 model
I have two favours i'd love to ask...
Firstly any chance you could you take a photo of where the thick wires that go from the battery to the outboard connect to
Secondly, could I get a photo of the wires by the tilt switch on the casing of the outboard. I disconnected them all and now am not sure if I have them correctly reconnected
Big ask but I would be totally thankful and owe you a pint when you pass by!
Cheers
Dan
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Old 28 April 2013, 14:18   #8
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Actually i think it might have been from you above!
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Old 28 April 2013, 14:22   #9
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In fact is that the outboard i purchased in the pics!?
Coincidence or what!
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Old 29 April 2013, 05:43   #10
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Willk & CJL,

Many thanks. I do feel a bit stupid but did assume that the level could be identified without removing the cowl.

Now I know... Once again many thanks!
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