compression issues on 1999 yamaha 200 ox66

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outrage261999

Recruit
Joined
Jan 28, 2010
Messages
3
I thinking of buying a 1999 outrage 21 with twin yamaha 200 ox66 its cold and i paid the boat yard who is brokering the boat to do a compression test on the engines the resuls were;
port.135,135,135,125,125,110
stbd.110,120,120,125,95,125
they told me that thosenumbers were fine,what should I do?
 
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PBJohn

Seaman
Joined
Nov 26, 2008
Messages
52
Re: compression issues on 1999 yamaha 200 ox66

Hire an independent boat surveyor to go over the entire boat. It's best to get an unbias opinion on all systems not only the engine. if it was me I would question the compression numbers given to you. Was the test done hot cold ? Did you sea trial?
 
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outrage261999

Recruit
Joined
Jan 28, 2010
Messages
3
Re: compression issues on 1999 yamaha 200 ox66

The boat was cold, it was a yamaha dealer who did the test, i was not there. but i was told the those numbers specifically the 95 was a reason for concern.
 
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rodbolt

Supreme Mariner
Joined
Sep 1, 2003
Messages
20,066
Re: compression issues on 1999 yamaha 200 ox66

take a mulligan on this one.
if they wish they can try a decarb then a leakdown test.
but the compression test is a total fail.
 
JustJason

JustJason

Vice Admiral
Joined
Aug 27, 2007
Messages
5,319
Re: compression issues on 1999 yamaha 200 ox66

I agree with rodbolt.

If you had already owned this boat and came in with those numbers i'd tell you to either run some p-tune or some seafoam through it and re-test. If the numbers came up then great, if they didn't i'd tell you to run it till she pukes... which wouldn't be to long.

Boats are a buyers market, especially in this market and at this time of year. Keep shopping around.
 
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outrage261999

Recruit
Joined
Jan 28, 2010
Messages
3
Re: compression issues on 1999 yamaha 200 ox66

thanks. I did pass , now I am thinking of repowering my outrage21 with an e tech 300 replacing a 2004 evin 250 with 200 hours and nothing wrong .am i crazy or does the additional 17k make sense. that would be my total out of pocket/
 
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turn2

Petty Officer 3rd Class
Joined
Jan 24, 2010
Messages
87
Re: compression issues on 1999 yamaha 200 ox66

Any 2 cylinders with more than 15 pounds difference = problems later. Are you not happy with your power or your speed on the 250. I dont think you are going to see a big difference in the 250 and the 300. But I have spent alot of money to go a little faster. That would be your call.
 
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CaptJay

Recruit
Joined
Feb 14, 2010
Messages
2
Re: compression issues on 1999 yamaha 200 ox66

turn2 is right.. however I like mine within 10 or less.. those numbers are NO GOOD in my opinion. I did seafoam thru my motors several weeks back and they gained 20 lbs compression on all cyl..im impressed by seafoam.. I had 100 lbs on all 12 cly's.. and now have 120 on all 12.. WOW.. that stuff works..
 
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Captn Dave

Petty Officer 2nd Class
Joined
Dec 5, 2001
Messages
176
Re: compression issues on 1999 yamaha 200 ox66

outrage261999 said:
thanks. I did pass , now I am thinking of repowering my outrage21 with an e tech 300 replacing a 2004 evin 250 with 200 hours and nothing wrong .am i crazy or does the additional 17k make sense. that would be my total out of pocket/
Click to expand...


Yup, you're crazy.
 
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