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Dec 30th, 2023
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 Jasper lower unit?
#11303538
12/25/15 11:19 PM
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Joined: Dec 2004
Posts: 29
stratos1
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Can a lower unit cause loss of rpm ? And why ?
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Re: Jasper lower unit?
[Re: stratos1]
#11303762
12/26/15 02:17 AM
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Joined: Jul 2011
Posts: 5,287
Dubee
TFF Celebrity
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TFF Celebrity
Joined: Jul 2011
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Re: Jasper lower unit?
[Re: stratos1]
#11303854
12/26/15 03:29 AM
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Joined: Oct 2005
Posts: 20,755
kingdad101
TFF Guru
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TFF Guru
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does it have the same gear ratio as the old one...
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Re: Jasper lower unit?
[Re: stratos1]
#11304171
12/26/15 02:52 PM
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Joined: Dec 2004
Posts: 29
stratos1
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It has the gear ratio as the motor year calls for,1998 Evinrude 225. Dubee, you say yes. Besides gear ratio how?
Never checked the ratio before the other one trashed, so really don't no.
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Re: Jasper lower unit?
[Re: stratos1]
#11304242
12/26/15 03:47 PM
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Joined: Nov 2006
Posts: 2,848
TLW
Extreme Angler
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Extreme Angler
Joined: Nov 2006
Posts: 2,848 |
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Re: Jasper lower unit?
[Re: stratos1]
#11304280
12/26/15 04:05 PM
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Joined: Dec 2004
Posts: 29
stratos1
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Re: Jasper lower unit?
[Re: stratos1]
#11304293
12/26/15 04:13 PM
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Joined: Feb 2015
Posts: 4,724
Flippin-Out
TFF Team Angler
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TFF Team Angler
Joined: Feb 2015
Posts: 4,724 |
Could the prop have been damaged (bent) and not noticed?
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Re: Jasper lower unit?
[Re: stratos1]
#11304294
12/26/15 04:14 PM
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Joined: Dec 2004
Posts: 29
stratos1
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Had the pitch on the prop changed from 24 to 22, got rpms back up to 5800. What is weird is the 24 pitch 4 blade will run 6000 rpms. Both are 14 1/4.
The rpm drop was right after new lower unit put on.
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Re: Jasper lower unit?
[Re: stratos1]
#11304297
12/26/15 04:15 PM
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Joined: Dec 2004
Posts: 29
stratos1
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Re: Jasper lower unit?
[Re: stratos1]
#11304336
12/26/15 04:37 PM
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Joined: Jul 2011
Posts: 5,287
Dubee
TFF Celebrity
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TFF Celebrity
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Posts: 5,287 |
Could be gears not meshing correctly.
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Re: Jasper lower unit?
[Re: stratos1]
#11304344
12/26/15 04:41 PM
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Joined: Nov 2006
Posts: 2,848
TLW
Extreme Angler
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Extreme Angler
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Posts: 2,848 |
sounds like a different gear... if something wrong and/or bad in tha gear case usually it (or motor) isn't long for this world...
Last edited by TLW; 12/26/15 04:44 PM.
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Re: Jasper lower unit?
[Re: stratos1]
#11304473
12/26/15 06:16 PM
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Joined: Dec 2004
Posts: 29
stratos1
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Re: Jasper lower unit?
[Re: stratos1]
#11305476
12/27/15 05:04 AM
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Joined: May 2009
Posts: 47
LOSTTEXAN
Outdoorsman
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Outdoorsman
Joined: May 2009
Posts: 47 |
I'm thinking Different gear.
You haven't talked about GPS speed difference, which would clue us in.
Grew up on Tawakoni and Texoma before hybrids and stripers existed on either.
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Re: Jasper lower unit?
[Re: stratos1]
#11305750
12/27/15 03:22 PM
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Joined: Dec 2004
Posts: 29
stratos1
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Outdoorsman
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Went from right at 70 to 62 gps.
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Re: Jasper lower unit?
[Re: stratos1]
#11306774
12/28/15 12:01 AM
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Joined: May 2003
Posts: 11,586
gary purdy
TFF Guru
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TFF Guru
Joined: May 2003
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Sounds like you got a 1.75-1 instead of a 1.86-1
The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
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