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    MP41080 Ignition switch

    Someone gave me a box full of boat and outboard parts.There is a 4 position push to choke Sierra ignition switch and I would like to use it on my 1972 25hp Johnson. There are 7 posts on the switch.The part I am not sure about is the one labeled I/ ignition and the one labeled S/ solenoid. I...
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    25E72R Need some help.

    I have a 1972 25hp Johnson that I bought from a friend at work. For 100 dollars. He said it was rebuilt. The compression is at 150 psi on each. Im sure my gauge is reading high but the compression is good. I took a chance but the shift lever is broken off flush. I put the motor in neutral by...
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    Home made OMC flusher

    I made a flusher for my motor. I bought a piece of 3/4 by 1/8 aluminum flat bar from home depot. As well as a hose barb with a 3/8 id outlet. I drilled and counter sunk the two screw holes and drilled a hole for the hose barb. I then opened up one side of a pair of muffs to hold it in place. The...
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    Lost cowling for 1978 4hp Johnson.

    4W78E I lost the cowling today on the way to the lake. I have a parts motor but it was missing the cowl when I bought it. There is a seller on EBAY that says the cowls from 1969 thru 1978 are interchangeable. If someone could please confirm that because I have found a couple that I want to go...
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    1995 20hp fast idle lever

    I bought a new lever and idle wire. The wire was missing and the groove in the lever was damaged and it would not move while turning the knob. The new lever is part number 12805 3. It seems to be the correct one. But the old one is part number 12805 4.The new one molds around the carb and the...
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    15hp Primer/Injector and carb question.

    My nephew has a what I believe is a 1994 15hp. Serial number G022821. He has had starting and running problems. This morning he had problems starting and when it did start he had to throttle up quickly to keep it running. Then he went a few hundred yards and he said it bogged down and died. He...
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    1994 20hp cold starting issue

    I have a 20hp mercury serial number G234977. When I first got it back when it was still warm, I did not have any cold starting problems. The manual says to turn the primer knob to the right and fully pull it out twice waiting 5 seconds between each pull. Then leave it out until motor starts and...
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    25 hp mercury serial number question.

    I bought my first Mercury outboard today. And I am a little confused about how to find out what year it is. The person I bought it from advertised it as a 1992. And when I was there he said around 1990 to 1992. The serial number is OG234977. To me it looks more like a 1995. I checked here at...
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    No spark on one cylinder while cranking.

    Evinrude 40604R. Some history. A month ago on the lake I had a hard time starting and when taking off I could tell it was only running on one cylinder. Then it started to run on both for the rest of the day. The next time out it started and ran good first thing. But later in the day it was...
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    Sierra tune up kit 18-5003

    I bought the kit and I was wondering what some of the contents were. There is 2 little squares of black paper. And the little cylinder with something black inside. I thought maybe the paper was for cleaning the points? And the other was oil for the oiler wick? Feel free to correct me if I am wrong.
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    Mid 70's 40hp flywheel timing marks.

    I have what is a 74 or 75 40hp flywheel with ring gear, that is in use on a 76 40hp rope start motor. The flywheel appears to have 2 sets of timing marks. 1 set is stamped with an E, and the other is stamped with a R. Does E= electric start and R= rope start? I am just curious. The R marks are...
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    Shakespeare 55lb thrust trolling motor

    I bought a 55lb thrust Shakespeare electric trolling motor off the rack. It was a demo model that is no longer being made. Made in China, and not much tech support. To my surprise it has worked well. Has good power, and my battery lasts all day long. So it functions quite well for the money I...
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    4w78 water discharge question?

    When looking at the motor from the back the four holes on the right spray a good amount of water. The four holes on the left only have droplets exiting from them. At higher rpms the four holes on the left discharge only sludge and a small amount of spray. Water pump was replaced spring of 2015...
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    Manual tilt problem.

    1976 40hp Evinrude on a 1970s fiberglass runabout. In the spring I rebuilt the transom and I built up the center where the motor sits, because the it was too short for my long shaft. I also had a leaky keel, but that has been fixed, so the boat sits higher now. For reference the bottom hole on...
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    76 40hp evinrude carb question

    Model 40604R. When the fuel bowl is drained or run dry of fuel the bulb will not fill the fuel bowl. I need to spray a little mixed fuel in the carb throat and it starts right up, and fills the the fuel bowl instantly. It remains full until I either drain it or run it dry again. I have tried two...
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    Do walleye shrink in the live well?

    I was watching a Canadian fishing show and it was said when put in a live well walleye will shrink a little bit.In the province I live in we have a slot size of 37cm to 50cm. That is roughly 14 1/2 to 21 inches. This morning I caught one just over 15 inches so I put it on a chain over the side...
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    1976 40hp evinrude battery question

    I have 1976 40hp with electric start and a 5amp charging coil. I use a deep cycle battery for everything else. I have been using a car battery for starting, with 625 cca and it worked well but it is 8 years old now and not holding a charge well. My manual states I need a 12 volt battery with 70...
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    9.5 evinrude no spark

    Model number 9122R. 1971 evinrude 9.5hp. It has been sitting for 4 or 5 years. I did use it for a couple of seasons, and it was always hard to start when warm. It would stall and then was hard to start. Once running it would run wot for 10mins or more and then when at idle it would stall. And...
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    battery charging question

    I have a 40hp evinrude model number 40604R. It has a 5amp charging system that is functioning. My question is, can I charge 2 batteries at the same time?
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    76 evinrude 40hp upper water tube removal

    Model 40604R. While dropping the gearcase the water tube came out stuck in the water pump. It appears like it is broken at the very top. I have another tube in my parts motor. My manual does not mention anything about removal. Do I need to remove the powerhead and take it out through the top? Or...
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