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#11130481 - 09/27/15 10:55 AM Maintenance on a Mercury 90
Elly Mae Offline
Outdoorsman

Registered: 02/09/14
Posts: 110
Loc: Aledo, Texas
We have a 2010 Merc 90, we replace lower gear oil & water pump every year. Is there any routine maintenance I should be doing to the motor?

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#11130565 - 09/27/15 11:51 AM Re: Maintenance on a Mercury 90 [Re: Elly Mae]
JimmyP Offline
Pro Angler

Registered: 11/26/12
Posts: 802
Loc: Waxahachie, Texas
fuel filter, new spark plugs, clean all battery cables,check water in batteries, check all connections under cowl for tightness and cleanliness, check under cowl for dirt daubers,check prop for line under it, check oil in power tilt/trim, check power steering fluid if you have hydralic steering, grease swivel bracket on motor, grease rams on tilt/trim and probably a few more I can't remember right now. LOL Just give it a good going over and you could save yourself some down time on the water.

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#11131224 - 09/27/15 03:14 PM Re: Maintenance on a Mercury 90 [Re: Elly Mae]
Elly Mae Offline
Outdoorsman

Registered: 02/09/14
Posts: 110
Loc: Aledo, Texas
Thank u for the info!

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#11131231 - 09/27/15 03:19 PM Re: Maintenance on a Mercury 90 [Re: Elly Mae]
gary purdy Online   content
TFF Guru

Registered: 05/24/03
Posts: 10511
Loc: Littlefield Tx & Lake A. H. US...
#1 preventative routine maintenance is using a good fuel additive like Sea Foam to prevent carbon build up and keeps the fuel good for extended periods of non-use.
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“The world will not be destroyed by those who do evil, but by those who watch them without doing anything” GOD IS GOOD

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#11140310 - 10/01/15 08:24 PM Re: Maintenance on a Mercury 90 [Re: Elly Mae]
Elly Mae Offline
Outdoorsman

Registered: 02/09/14
Posts: 110
Loc: Aledo, Texas
I think he puts Stabil of something like that in there. I'm assuming that's the same thing??

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#11150846 - 10/07/15 05:09 PM Re: Maintenance on a Mercury 90 [Re: Elly Mae]
KLAPPER Offline
Angler

Registered: 09/10/15
Posts: 300
Loc: Jacksboro Texas
What do you mean check prop for line under it?
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#11151093 - 10/07/15 07:38 PM Re: Maintenance on a Mercury 90 [Re: Elly Mae]
JimmyP Offline
Pro Angler

Registered: 11/26/12
Posts: 802
Loc: Waxahachie, Texas
Fishing line will get in the prop and get under it and mess up the seal that keeps it water tight. Also under the trolling motor prop. You have to take the prop off and then reinstall and torque back down. Not a big deal but can save a few hundred bucks.

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#11152140 - 10/08/15 12:15 PM Re: Maintenance on a Mercury 90 [Re: JimmyP]
KLAPPER Offline
Angler

Registered: 09/10/15
Posts: 300
Loc: Jacksboro Texas
Originally Posted By: JimmyP
Fishing line will get in the prop and get under it and mess up the seal that keeps it water tight. Also under the trolling motor prop. You have to take the prop off and then reinstall and torque back down. Not a big deal but can save a few hundred bucks.


I think I was over thinking that lol
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