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Thread: OMC 70hp 3 cyl
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07-06-2015, 09:45 PM #15000 RPM
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OMC 70hp 3 cyl
Does anybody have a written procedure with photos for removing the powerhead from a 90s OMC 3 cyl 70hp,
My guess is it should only really be the 6 powerhead bolts, motor is already off boat so all electrics and fuel lines already disconnected?
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07-06-2015, 10:54 PM #25000 RPM
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Should just have the 6 bolts and 1 nut at the very back of the powerhead and the shift linkage. The nut is kind of tucked away in the back up under the head but you should be able to find it pretty easy.
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07-07-2015, 06:24 AM #35000 RPM
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Would anybody hazard a guess as to what crank an 1990 has multi or 4 spline? and Block oval or bridge port?
I'm hoping its a 4 spine Bridgeport to convert to a sst60 setup.
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07-07-2015, 12:56 PM #4
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07-07-2015, 04:51 PM #5
You can swap the cranks.
TMc
1984 Allison XR2002
1987 2.7 Fuel Injected Evinrude
16" Taylor mid
Brucato ACU.
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07-07-2015, 06:00 PM #65000 RPM
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What about the block oval or Bridgeport?
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07-07-2015, 06:53 PM #75000 RPM
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Oval port came out in 94
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07-07-2015, 07:37 PM #85000 RPM
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07-10-2015, 05:05 PM #95000 RPM
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I didn't check all the years but yes it should fit
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07-11-2015, 10:41 AM #10
Yes..
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09-04-2015, 04:58 PM #11
some of the early 49cu in also had multi spline in longshaft versions.
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09-05-2015, 07:27 AM #12
This is EXACTLY why I LOVE this site and the great minds swimming around in it !!! what a great response to a question you would try and ask on the street and probably never get a straight answer to. way to go guys !!!
most overnite successes usually take at least 10 years
Certified turd polisher,
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