Question about Light Outboard Motor Boat Bass Fishing Saltwater Base

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Need oil change in water

I have a Mercury 90 HP outboard engine. I need to change the oil and filter but cannot take the boat out of the water. What is the best way to do this?

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If its a 2 stroke, there is no oil to change, if its a 4 stroke, you can pump the oil out with a small diameter tube pump.Depending on the motor, you can get it through the dipstick or the fill opening. If you need to change the gear oil, there is no way to change it while in the water. Stop by a marine supply store and get some oil absorbsion pads (diapers) in case you happen to spill any oil into the water

Posted on Apr 14, 2009

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Turn The Boat Around So That The Engine is Nea The BankrUn Bolt The Gear Box From The Engine On The Bank,
Change The Impeller On Dry Land Replace Gear Oil and Re Fit
The Gear Box.
The Engine Does Not Have Oil Change Unless It Is A Four Stroke.
If It Is The Drain Plug Is On The Side Of The Mid Section And Can Be Drained With Leg Trimmed Up About Half Way
Sorry This Is Best Way.

Posted on Mar 17, 2013

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Posted on Jan 02, 2017

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Looking for a 2016 tracker targa V 18 combo with a 150 HP murcury 4 stroke outboard engine owners manual


Manual is in the first link

Mercury 150 FourStroke Manual

https://dmna.ny.gov/nynm/manuals/Mercury_150_FourStroke_Manual.pdf
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Owner's Resources ' Mercury Marine

https://www.mercurymarine.com/en/au/service-and-support/owners-resources/ The major consideration in preparing your outboard for storage is to protect it from rust, corrosion and damage caused by freezing of trapped water. Outboard Storage tips ... Mercury Authorised Dealers have the expertise and training to handle all of your engine maintenance service and needs. Engine Maintenance.

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https://www.mercurymarine.com/en/ca/engines/outboard/fourstroke/150-hp/ The specifications displayed here may not be indicative of the entire engine family; click on the "See All Models and Specs" link to view the specs in detail. ... Perfect for Repower. The compact, lightweight design of the Mercury® 150hp FourStroke engine fits most transoms, including those with narrow engine wells and tight ...

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150 HP Mercury 4 stroke outboard engine owners manual Google Search

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1 Answer

WHATS THE FUEL AND OIL RATIO FOR 25HR 2CYL OUTBOARD MERCURY


need the year of manufacture as some 2 stroke units have oil injection that automatically mixes the oil in the correct ratio for engine rpms otherwise it is 50:1 ( 50 parts fuel to 1 part oil)
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reference
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1 Answer

I have a 20 hp mercury outboard serial#06082001.I want to know what year it is and if it's 2 or 4 stroke


If you drop the first zero it would put it at 1981.

http://www.themarinedoctor.com/msn.pdf

this site gives a different answer, as 1980- 81, so close. It SUGGESTS it is a 4 stroke engine.

http://www.boats.net/parts/search/Merc2/Mercury/25%20%282%20CYL.%29%282-STROKE%29%28International%29/parts.html

It is likely a 4 stroke, but I won't give you a definitive answer, due to the damage it can cause with a guess!

A four stroke running with two stroke oil will just smoke, but a two stroke with no oil will seize and leave you stranded on the water with a seized engine!

A four stroke engine has valves operated by push rods or a pulley and a chain, a two stroke just has a head. Take a look at the engine and it should be obvious.

For your first service, I would suggest you go to a marine engineer. Ask all the questions, and get the right answers. When I had my 1986 Evinrude serviced, i typed a list of questions and left the list with him. i asked him when I picked up the boat and wrote the answers down. The first one was 'petrol to oil ratio and which is the best oil'. A basic service will cost you a hundred bucks and you will have some comfort that you are unlikely to break down, 6 miles offshore with only a paddle :)

https://www.google.ca/search?q=20+hp+mercury+outboard+serial%2306082001&ie=utf-8&oe=utf-8&gws_rd=cr&ei=uwm-WKjHK6SUjwSApJLQBw#q=mercury+outboard+serial+number+lookup&*

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1 Answer

Electric diagram mercury 90hp outboard 1987


Kevin,
Here you go. This is for the 90-115-140 hp models 1980 (ser# 5594657) and up years.

maxrules.com/oldmercs/Wiring/1966ona/37.pdf

Hope this helps get you back on the water. Happy boating.

Fred-

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There are videos all over YouTube that cover this subject quite nicely.
winterizing an outboard motor YouTube

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1 Answer

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Water gets in your engine through the exhaust with the boat speed! Lift that engine when not in use!

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1 Answer

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