Need advice on purchase

[Big-G]

Compression is above 200 on each cylinder according to owner.

Good advice on removing cover while priming.

I thought of offering $6,000 since this V20 is as good as any I have looked at in the past 2 years.

Thanks much for the input

Big-G

[ssiredfish]

Not sure about your year but my 93 Ocean Runner 150 left me hi and certainly dry. The rings split on mine basically making the engine worthless. They are notorius for this but not sure about that year. I would def. research it though......

[Big-G]

Offered $6,000. Offer rejected. Don't think anyone will offer more.

Been looking for V20/21 for last two years. Sure wish this boat had a Yama or Merc on the stern.

Thanks a bunch, everyone, for the feedback.

Big-G

[spareparts]

if that engine has 200 psi on the compression test, someone is lying or needs a new compression tester(should have been in the 120 range). I'm not a big fan of those engines although some people like them. Keep in mind, they were not made for very long , have a history of corrosion issues, and a lot of engine components are no longer available, from any one. i wouldn't have gone any higher than $5000. I'll go ahead and fly the flag on this one

[THEFERMANATOR]

100-120 sounds about right, 200 would require 116 octane and a whole lot of other things to go with it. They had a pretty good production run I thought being built for 14 years. Not a long run like the MERCS V-6's though. The optic sensor for the igntion system is a problem area as many will attest. The HUGE downside to them was they were THIRSTY PIGS! For a 150 they drank as much fuel as most 225's at cruise. I think $6K was more than fair for a V21 in excellent shape with a not so great engine, if anything it was quite a bit to high. If the owner isn't willing to negotiate on a boat he KNOWS needs work, then I would walk.

[bradford]

I'm a little wary of rigs stored on lifts. Hard to do a lot of routine maintence stuff with it swinging on a lift. $6000 is still too high for something with known problems. What other problems are there you don't yet know about?

Hang around, the deal of the century will come along sooner than later. Especially with autumn coming up.

[bgreene]

Boat sounds like a winner, and fairly rare condition, but the motor is the issue.

I had two of those 150 loopers - solid performers.

See if it's still for sale after days, weeks, months, and maybe your offer will sound better.

Good luck.

[Larryrsf]

Originally Posted by spareparts

if that engine has 200 psi on the compression test, someone is lying or needs a new compression tester(should have been in the 120 range). I'm not a big fan of those engines although some people like them. Keep in mind, they were not made for very long , have a history of corrosion issues, and a lot of engine components are no longer available, from any one. i wouldn't have gone any higher than $5000. I'll go ahead and fly the flag on this one

My factory-trained mechanic said the compression numbers should be within a few pounds of each other-- which is more important than the number itself. He declared my old Evinrude 150 in "new" or recently overhauled internal condition with compression just over 100# in ALL 6 Cylinders. If one had been several pounds lower, that would have indicated problems with rings or valves, etc.

Larry

[THEFERMANATOR]

Originally Posted by Larryrsf

My factory-trained mechanic said the compression numbers should be within a few pounds of each other-- which is more important than the number itself. He declared my old Evinrude 150 in "new" or recently overhauled internal condition with compression just over 100# in ALL 6 Cylinders. If one had been several pounds lower, that would have indicated problems with rings or valves, etc.

Larry

Ideally you want all cylinders within 5% of each other, but 10% is considered accepteable. You also want to make sure they are within a certain range though as I have seen engines wore slam slap out have compression with 2% of each cylinder, but were shot internally. Had a V4 with all cylinders at 60, but a good engine like it should have been at 115-120. Turns out it had standard pistons in a .020 bore engine. When I finally got it to run, it rattled like a metal can filled with rocks.

[spareparts]

Originally Posted by Larryrsf

My factory-trained mechanic said the compression numbers should be within a few pounds of each other-- which is more important than the number itself. He declared my old Evinrude 150 in "new" or recently overhauled internal condition with compression just over 100# in ALL 6 Cylinders. If one had been several pounds lower, that would have indicated problems with rings or valves, etc.

Larry

what your factory trained mechanic told you is true, the % between the cylinders tell more than the actual numbers them selves. But when I see compression numbers on a 2 stroke so far out of range that they can't be realist, I usually call BS on the numbers