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mrfreeze001001 
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Joined: December-25-2012 Location: ohio Status: Offline Points: 20 |
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 Topic: rpm dropPosted: June-16-2013 at 11:17am |
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i have a 1994 ski nautique 351 velvet 1.1 drive. idle won't stay the same and when put in forward gear rpms drop 800. when put in reverse there is no drop in rpms. lowest idle i can get with it in forward is 1000 rpm. but after running. rpms change.
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: June-16-2013 at 2:10pm |
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Ken,
If I understand correctly, you get a 800 RPM drop in forward to 1000 RPM but no drop in reverse? What's the RPM in neutral? How's the throttle and shift cable adjustment? Any vacuum leaks on the intake side of the engine? |
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mrfreeze001001
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Joined: December-25-2012 Location: ohio Status: Offline Points: 20 |
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Posted: June-16-2013 at 2:37pm |
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about 1800 in neutral. cable adjustment seams fine replaced gaskets under carb and spacer sprayed with carb cleaner around gaskets engine sounded ok no differance in sound. im thinking vaccum problem also. because idle changes. but don't know where else to check thx for the reply. just got boat running its been setting for 7 years. before i got it. had carb rebuilt.
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: June-16-2013 at 3:27pm |
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Ken,
Have you tried removing the throttle cable from the carb to make sure it's not holding it open slightly? You can also see if the carb is being held open. |
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mrfreeze001001
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Posted: June-16-2013 at 3:43pm |
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yes tryed that. first thing
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mrfreeze001001
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Posted: June-16-2013 at 3:45pm |
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i can turn idle screw out without it in gear and get it down to about 900 in neutral before it wants to stall
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