Revs

 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's picture

Posts: 1153

Date Joined: 02/02/09

Its most likely due to the

Sun, 2019-01-20 18:29

Its most likely due to the back pressure on the exhaust from being submerged at the ramp

Scotte's picture

Posts: 989

Date Joined: 07/12/06

As above.

Sun, 2019-01-20 21:30

 Yep back pressure, huge change in the tune in or out of the water.