Main Menu
Advertisement
Affiliates
Advertisement
Newest Members
Shawnmorrow, c_mack, Rainwater, 0409, Weng
105918 Registered Users
Top Posters
TexDawg 86346
hopalong 78578
Pilothawk 75166
JDavis7873® 67382
John175 ® 65063
FattyMcButterpants 60793
Derek 🐝 58502
Tritonman 57644
LoneStarSon® 53410
SkeeterRonnie 53014
facebook
Forum Stats
105918 Members
60 Forums
804880 Topics
10172265 Posts

Max Online: 36273 @ 01/23/13 02:34 PM
Page 1 of 3 1 2 3 >
Topic Options
#11392088 - 02/04/16 02:50 PM Compression test results- Thoughts?
Jersey Dan Offline
Guido

Registered: 01/01/07
Posts: 6416
Loc: your sisters house
Have a buddy who is thinking about purchasing a boat. What are your thoughts on the following compression readings?

95
97
105
105
97
90

Top
#11392095 - 02/04/16 02:54 PM Re: Compression test results- Thoughts? [Re: Jersey Dan]
snickers Offline
TFF Team Angler

Registered: 05/08/09
Posts: 4095
how old and what motor

Top
#11392104 - 02/04/16 02:57 PM Re: Compression test results- Thoughts? [Re: Jersey Dan]
Brandon Dickenson Offline
TFF Team Angler

Registered: 09/01/04
Posts: 4343
Loc: Conroe
They say to have all cylinders within 10-15%. I suppose he should be ok, but I hope he knows going in that it can blow any minute.

Top
#11392113 - 02/04/16 02:59 PM Re: Compression test results- Thoughts? [Re: Jersey Dan]
bradnitro175 Online   content
TFF Team Angler

Registered: 07/11/08
Posts: 4424
Loc: Dallas,tx
Test drive it then test it again bet it goes up.if not I'd pass

Top
#11392152 - 02/04/16 03:10 PM Re: Compression test results- Thoughts? [Re: Jersey Dan]
JIM SR. Offline
TFF Celebrity

Registered: 09/25/06
Posts: 6826
Loc: NRH/Fork ! GET THE NET
if it was an old straight 6 I'd say it had a warped head,..who knows.
22% difference in 105 to 90,...age and hours is always a factor..
and who done the test,..??

Top
#11392194 - 02/04/16 03:25 PM Re: Compression test results- Thoughts? [Re: snickers]
Jersey Dan Offline
Guido

Registered: 01/01/07
Posts: 6416
Loc: your sisters house
Originally Posted By: snickers
how old and what motor


225 optimax w/ 700 hours.

Top
#11392203 - 02/04/16 03:29 PM Re: Compression test results- Thoughts? [Re: Jersey Dan]
bogey♂ Offline
TFF Guru

Registered: 02/21/08
Posts: 15300
Loc: plano
Is there a scale in said boat?
_________________________


bassboatseats.com

Top
#11392223 - 02/04/16 03:34 PM Re: Compression test results- Thoughts? [Re: Jersey Dan]
DKennimer Offline
Extreme Angler

Registered: 03/01/10
Posts: 2862
Loc: Plano/Fork
I would be a little hesitant with the cyl showing 90 (assuming it's a quality guage being used)... Definitely get a leak down test done!! That's the only real way to find out the motors "health".

Top
#11392227 - 02/04/16 03:36 PM Re: Compression test results- Thoughts? [Re: Jersey Dan]
Fast Lane Offline
TFF Celebrity

Registered: 07/24/06
Posts: 5763
Loc: Tyler, texas
Should be in the 110-119 psi range.

Top
#11392286 - 02/04/16 03:53 PM Re: Compression test results- Thoughts? [Re: Jersey Dan]
bossman Offline
Outdoorsman

Registered: 07/22/02
Posts: 127
Loc: winnsboro,tx, usa
Since you are asking, there must be some concern about that engine. Don't buy a boat you have "some" concern about. Once it blows, you knew better to begin with. But with that said, there are two types of engines...1) those that are blown, 2) those that are gunna blow.

Top
#11392302 - 02/04/16 03:59 PM Re: Compression test results- Thoughts? [Re: Jersey Dan]
gary purdy Online   content
TFF Guru

Registered: 05/24/03
Posts: 11131
Loc: Littlefield Tx & Lake A. H. US...
I would buy it with the intent of freshening the motor.
_________________________
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

Top
#11392339 - 02/04/16 04:10 PM Re: Compression test results- Thoughts? [Re: Jersey Dan]
Mark Perry Online   content


Registered: 01/09/04
Posts: 51121
Loc: Highway 1
Have him run it by a dealer for a leak down test. Often there is a ton of variance between compression gauge sets. The leak down being more accurate. Its cheap insurance. Spend $100 now to save $4000-10,000 later.
_________________________

The dream is free, the hustle is sold separately.

Top
#11392465 - 02/04/16 04:59 PM Re: Compression test results- Thoughts? [Re: Jersey Dan]
Frank the Tank Online   content
TFF Guru

Registered: 02/27/13
Posts: 20188
Loc: Rockwall & a lake somewhere
^^^^^ yep... And if those are the right numbers, I'm not buying that boat. That motor I headed for a rebuild.


Edited by Frank the Tank (02/04/16 05:18 PM)
_________________________
Proverbs 3:5&6
Talon Lures - high quality, hand tied lures made in Texas.
Team McRib - unable to get logo to upload


Top
#11392494 - 02/04/16 05:11 PM Re: Compression test results- Thoughts? [Re: Mark Perry]
Bruce's Guide Service Online   content
TFF Team Angler

Registered: 09/04/03
Posts: 4010
Loc: southlake
Originally Posted By: Mark Perry
Have him run it by a dealer for a leak down test. Often there is a ton of variance between compression gauge sets. The leak down being more accurate. Its cheap insurance. Spend $100 now to save $4000-10,000 later.


this. plus 700 hours is a lot, but i had one that i sold with 932 and its still running to this day and he has around 1135 on it now. maintenance and service records
_________________________
Bruce's Sprinkler Repair
817-798-7246
47 years experience
State Licensed Irrigation
LI0017483


Fishing Texas lakes one at a time







Top
#11392626 - 02/04/16 06:13 PM Re: Compression test results- Thoughts? [Re: Jersey Dan]
Gamblinman Offline
Extreme Angler

Registered: 11/26/02
Posts: 2769
Loc: Yantis, TX
Yep...leakdown test...5 to 8% leakdown at max, anymore, I would reduce my offer substantially to compensate for freshening up.

Gman
_________________________
Texas Crappie Posse

Top
Page 1 of 3 1 2 3 >



© 1998-2017 OUTDOOR SITES NETWORK all rights reserved USA and Worldwide