Moderated Discussion Areas
ContinuousWave: Whaler Performance
Evinrude 70-HP Maximum Engine Speed
|Author||Topic: Evinrude 70-HP Maximum Engine Speed|
posted 01-14-2004 10:27 AM ET (US)
How many RPM should a c.1985 Evinrude 70-HP turn at wide open throttle?
posted 01-14-2004 11:47 AM ET (US)
Depends on what year. Up to 1985 I believe they redlined at 5500. From 1986 or 1987 on they redline at 6,000. What is your model # so I can check the year.
posted 01-14-2004 09:01 PM ET (US)
It's an 1985--E70ELCOS
posted 01-14-2004 09:21 PM ET (US)
Your engine is a 1985, RSGwynn.
Red sky at night. . .
posted 01-14-2004 10:00 PM ET (US)
Thanks. I believe I'm a little short on prop.
posted 01-14-2004 10:08 PM ET (US)
The common props used on that engine are the 13 1/4 x 17" pitch or the 13 3/4 x 15" pitch..
The 17 gives you a little more top end and the 15 gives you a little better hole shot.
I used both props at different times on my 1985 Evinrude 70 hp on my Montauk... Yours is the same engine as mine was..
posted 01-14-2004 11:22 PM ET (US)
posted 01-16-2004 12:42 PM ET (US)
With a 15' classic whaler hull, you can actually run a 13"x19" Stainless with cupping on an '85 Johnson 70Hp engine. Just don't try to pull up slalom skiers with this prop on the engine.
With my 13-1/4"x17" cupped aluminum, it will actually spool up higher than redline at Wide-Open-Throttle (WOT).
If the hull is a 17' classic, use the props whalersman suggested.
posted 01-16-2004 11:17 PM ET (US)
This is on a 14 ft. McKee Craft that I'm restoring. I think the hull is very close to the Whaler 15. I just got a used ss prop, slightly dinged up, that looks to be a 19, so I'll give it a run to see what rpms I get before I take the prop to the shop to have it redone and maybe repitched.
posted 08-27-2007 01:56 PM ET (US)
I have a 1986 70 Johnson VRO on a 15' Striper. Is the max RPM 6000 for this year motor? Model # is J70TLCO.
posted 08-28-2007 11:48 AM ET (US)
Actually your model # says 1985 and no that is 5500. 86 is 5500 as well, I think 87 started the 6k.
posted 08-28-2007 02:04 PM ET (US)
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