2002 250 ox66 compression

[mr gibbs2]

thinking of buying a 2002 ox66 250 hp yamha getting out of the late 90s evinrude loopers . i found a motor with compression at 120 on all 6 cylinders tested my me with my gauge always on the money, the motor starts, runs good on the stand , unknown hours , no gauges . my question is , is the compression on this motor represent a low hour motor , strong etc or What should it b. my evinrude loopers were strong at 105 per cylinder . and what would be a fair price thanks JD

 

[scoflaw]

120 is the number for a healthy 1. 4 to 4500 in the sw florida area

 

[jerryjerry05]

You can't tell the hours by the compression.
I had a pair of 88/85 hp on my boat.
The compression was 145-150 from the first day and to the last day.
Had to remove them as the salt finally ate the transom brackets.

If you have 5 with 120 and one with 90??
That would be something to look into??

My neighbor has a 2005 200 Yam.
Ran it low on oil 1 time
Has 120 on 5 and 100 on #6
Still runs great but has a "tick" when running.
Been like this for years.

Lower comp can also be a bad gauge.
Sold a 2002 Mercury 225
The buyer had a NEW gauge from Harbor Freight.
He started the comp tests and got 80# on the first 2 cyl.
I stopped him and said we'll use my tools.
Got my MAC tester and comp was 145 all 6.

Cheapo tools get cheapo results.

Sounds like the motor's a good candidate.

If you buy?? Yam's oil tanks can have sludge (caused by condensation) build up after time.
Remove the tank and see how much gunk's in the bottom.

 

[mr gibbs2]

Hello thanks for the response , I picked up the motor now solid 120 pounds across the board . Now I need to find the right harness or harnesses . Trying to source what I need I have a new 704 controller and a tack Do I need I ten pin that goes to the controller tfrom the motor then the controller to the key switch . Kinda list all my other motors have been Johnson Evinrude. And help would be appreciated

 

[99yam40]

see if you can find a rigging guide

 

[mr gibbs2]

I have it figured out now thanks

 

[Faztbullet]

Make sure to use good fuel,good oil and prop it to the upper RPM band and use the Yamaha ring free plus.