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Can I use high pressure gear oil in my outboard motor leg 80 / 90 with out damageing it?

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None of this answered my question ! can I use high pressure gear oil in my in/out board mercury motor leg???

Posted on May 07, 2017

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

leetamara
  • 702 Answers

SOURCE: 1989 Ford Mustang GT Drop in Oil Pressure gage

I hate be the bearer of bad news but it sounds like you bottom end bearings are getting worn out. You have excessive bearing clearances causing your drop in oil pressure.

Posted on Jul 13, 2008

  • 6 Answers

SOURCE: 1974 johnson outboard motor 25hp stalls when hiting high end

Not familiar with that specific motor but had similar vintage smaller HP Johnsons. From my experience it sounds like it could be that the high speed carb adjustment is too lean. What I would try is running the backing off the high speed screw 1/4 turn to 3/4 turn, then test. If works better, screw back in in 1/8 turn increments until the problem recurs, then back out 1/4 turn and leave it there.

Posted on Jun 30, 2009

  • 86 Answers

SOURCE: sealing the gear casing on an old Chrysler 20 outboard motor.

You can get aftermarket seals and such as long as they match the old ones. You can also use Lubriplate 105 in the gearcase instead of the High Performance gear oil. The 105 is alot heavier and will not hurt it. It will actually get you more life out of a tired gearcase. The main thing that you want to remember is that you have to put the engine in fwd gear and then disconnect the shift linkage. That is so that when you are reinstalling the gearcase you can turn the prop by hand to line up the splines in the powerhead. after you disconnect the shift linkage you should be able to just slide it right out. Make sure that you replace the seal under the waterpump base also.

Posted on Aug 10, 2009

  • 91 Answers

SOURCE: suzuki outboard motor 65 hp --oil sensor keeps

assuming you are not out of oil in your oil reservoir you probably have a bad sending unit in the reservoir. never bypass it or eliminate it as you could permanently damage your motor or ruin it if you ran it out of oil.

Posted on Jun 20, 2010

  • 1168 Answers

SOURCE: I have an Evinrude outboard

Hello Pvsteward.

I would not recommend an electric pump to boost your pressure. A definite fire hazard as well.
A boats biggest enemy!
If you have a built in fuel tank it will have an anti-siphon valve installed.
The valves are there to prevent fuel spillage in case of a hose rupture.
These valves can trip at full throttle on big outboards due to the large amount of fuel consumption.
You may need to get a valve capable of a higher flow.
This happened to me when I went from a 135 to a 175HP.
A new valve did the fix.
Have you checked the screen in the fuel pump? In behind the inlet many OMC pumps had a screen to filter out debris. It may be worth a look.

If you would like further advise on this, please ask me in a comment.
Thank you for using FixYa.
KL

Posted on Mar 16, 2011

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Sealing the gear casing on an old Chrysler 20 outboard motor.


You can get aftermarket seals and such as long as they match the old ones. You can also use Lubriplate 105 in the gearcase instead of the High Performance gear oil. The 105 is alot heavier and will not hurt it. It will actually get you more life out of a tired gearcase. The main thing that you want to remember is that you have to put the engine in fwd gear and then disconnect the shift linkage. That is so that when you are reinstalling the gearcase you can turn the prop by hand to line up the splines in the powerhead. after you disconnect the shift linkage you should be able to just slide it right out. Make sure that you replace the seal under the waterpump base also.

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