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Compression
#13016793
01/04/19 04:08 AM
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Joined: Mar 2015
Posts: 89
cjumper
OP
Outdoorsman
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OP
Outdoorsman
Joined: Mar 2015
Posts: 89 |
Looking at a Ranger with an ‘03 Yamaha 250. Compression is 100, 100, 90, 100, 90, 100. I know you want them all to be within 5-10 of each other but is the 90-100 good?
cjump
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Re: Compression
[Re: cjumper]
#13016827
01/04/19 04:52 AM
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Joined: Dec 2008
Posts: 16,219
grout-scout
TFF Guru
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TFF Guru
Joined: Dec 2008
Posts: 16,219 |
You’d have to know the exact way the procedure was done to answer your question.
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Re: Compression
[Re: cjumper]
#13017074
01/04/19 02:39 PM
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Joined: Jul 2010
Posts: 1,352
boatman025
Extreme Angler
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Extreme Angler
Joined: Jul 2010
Posts: 1,352 |
There good if there with in 10%
Hughes Marine 3855 Osage Lane Wylie ,Texas
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Re: Compression
[Re: cjumper]
#13017682
01/04/19 11:33 PM
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Joined: Dec 2013
Posts: 459
PlanoPaul
Angler
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Angler
Joined: Dec 2013
Posts: 459 |
Compression numbers tell you a little bit....
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Re: Compression
[Re: PlanoPaul]
#13017785
01/05/19 01:19 AM
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Joined: Mar 2015
Posts: 89
cjumper
OP
Outdoorsman
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OP
Outdoorsman
Joined: Mar 2015
Posts: 89 |
What are the other indicators?
cjump
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Re: Compression
[Re: cjumper]
#13018439
01/05/19 05:55 PM
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Joined: Nov 2007
Posts: 5,526
ssmith
TFF Celebrity
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TFF Celebrity
Joined: Nov 2007
Posts: 5,526 |
was the motor run to warm temp before checking if not time was wasted.
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Re: Compression
[Re: ssmith]
#13019053
01/06/19 03:09 AM
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Joined: Mar 2015
Posts: 89
cjumper
OP
Outdoorsman
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OP
Outdoorsman
Joined: Mar 2015
Posts: 89 |
This I do not know but will find out!
cjump
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Re: Compression
[Re: ssmith]
#13019417
01/06/19 05:34 AM
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Joined: Apr 2017
Posts: 12,246
tmd11111
TFF Guru
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TFF Guru
Joined: Apr 2017
Posts: 12,246 |
was the motor run to warm temp before checking if not time was wasted. Also was the throttle held open all the way.
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Re: Compression
[Re: cjumper]
#13019449
01/06/19 09:16 AM
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Joined: Jul 2010
Posts: 643
ETxRT
Pro Angler
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Pro Angler
Joined: Jul 2010
Posts: 643 |
A leak down test is a better indicator of motor health
2011 Legend Alpha 211 DCX 250 Mercury Pro XS- 25p Tempest B&B’d by Josh at Steve’s Custom props 36v Motorguide Xi5 connected to Lowrance HDS 9 Gen 2 Humminbird Solix 10 CHIRP MSI G2, Onix 10
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Re: Compression
[Re: ETxRT]
#13019705
01/06/19 05:14 PM
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Joined: Mar 2015
Posts: 89
cjumper
OP
Outdoorsman
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OP
Outdoorsman
Joined: Mar 2015
Posts: 89 |
What is this test, I’ve not heard of this before?
cjump
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Re: Compression
[Re: tmd11111]
#13019707
01/06/19 05:14 PM
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Joined: Mar 2015
Posts: 89
cjumper
OP
Outdoorsman
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OP
Outdoorsman
Joined: Mar 2015
Posts: 89 |
cjump
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Re: Compression
[Re: cjumper]
#13019725
01/06/19 05:36 PM
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Joined: Dec 2013
Posts: 459
PlanoPaul
Angler
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Angler
Joined: Dec 2013
Posts: 459 |
I can just tell you that I have dealt with two used motors that had perfect compression when I bought them, and ended not being completely mechanically sound. I am in the process of rebuilding the second one, and found that all of the lower rings were stuck in their grooves, but the upper rings were fine which is why it was still able to make good compression. Anyways, other important things to look at in my opinion are the hours and how was it taken care of.
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Re: Compression
[Re: PlanoPaul]
#13019810
01/06/19 07:37 PM
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Joined: Mar 2015
Posts: 89
cjumper
OP
Outdoorsman
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OP
Outdoorsman
Joined: Mar 2015
Posts: 89 |
cjump
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Re: Compression
[Re: cjumper]
#13020700
01/07/19 03:28 PM
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Joined: May 2003
Posts: 11,586
gary purdy
TFF Guru
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TFF Guru
Joined: May 2003
Posts: 11,586 |
How does it run? If it performs right, buy it and always and I mean always run a carbon cleaner in this motor. Techtron or Ring Free +, or yes Sea Foam in the fuel.
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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Re: Compression
[Re: gary purdy]
#13021864
01/08/19 04:17 AM
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Joined: Mar 2015
Posts: 89
cjumper
OP
Outdoorsman
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OP
Outdoorsman
Joined: Mar 2015
Posts: 89 |
Gary, have not taken the ride yet but hope to shortly. That is for the advice!!!! It is welcomed.
cjump
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