Revs
Submitted by dakka on Sun, 2019-01-20 17:30
Howdy all
just chasing a bit of info from the gurus or techies on site, I have a 1990 90hp v4 evinrude 2 stroke outboard.
when I start it at home with the muffs on I can get up to 3000rpm when using idle lever, but when I'm in the water and at ramp starting it I can only get about 1000-1100rpm with idle lever which makes it hard to warm the ole girl up as she stalls a bit if I can't get the revs up any ideas as too why cheers and thanks.
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Lastchance
Posts: 1273
Date Joined: 02/02/09
Its most likely due to the
Its most likely due to the back pressure on the exhaust from being submerged at the ramp
Scotte
Posts: 1145
Date Joined: 07/12/06
As above.
Yep back pressure, huge change in the tune in or out of the water.