Pumped OS 120 question
06-12-2016, 11:14 AM
#1
Thread Starter
Join Date: Jul 2005
Location: Auburn, AL
Posts: 410
Likes: 0
Received 0 Likes
on
0 Posts
Pumped OS 120 question
Afternoon everyone,
I just got a pumped OS 120 from a friend who found it for me at Nall this year. It's in pretty good shape. Bearings are smooth, compression is good, valves seem correctly adjusted. It has a few dings on it but it has the appearance of a good engine. Since it didn't come with any instructions I've run into a mystery. It has three fittings on the pump. One already has a line to the carb. The other two don't have any lines on them. I'm guessing one brings in fuel from the tank and have no idea what the other one is. A return line maybe? Which fitting goes where? I can figure it out with a little trial and error but if anyone can shed some light on this it would be appreciated. Thanks!!
Rick H.
I just got a pumped OS 120 from a friend who found it for me at Nall this year. It's in pretty good shape. Bearings are smooth, compression is good, valves seem correctly adjusted. It has a few dings on it but it has the appearance of a good engine. Since it didn't come with any instructions I've run into a mystery. It has three fittings on the pump. One already has a line to the carb. The other two don't have any lines on them. I'm guessing one brings in fuel from the tank and have no idea what the other one is. A return line maybe? Which fitting goes where? I can figure it out with a little trial and error but if anyone can shed some light on this it would be appreciated. Thanks!!
Rick H.
06-12-2016, 04:57 PM
#3
Thread Starter
Join Date: Jul 2005
Location: Auburn, AL
Posts: 410
Likes: 0
Received 0 Likes
on
0 Posts
Dave I appreciate such a quick response and that PDF is excellent. The only problem is that I don't think it applies to my engine. It refers to a Surpass iii and shows a pressure regulator located on the back near the carb. My engine shows no reference to being any kind of a Surpass version and has no regulator that I can see. I suspect this one is a much earlier version and while I expect it to run well assuming the pump still works I will still have to experiment a bit to make sure I have it all hooked up correctly. Well if it were too easy it wouldn't be R/C would it?
Rick H.
Rick H.
06-13-2016, 06:42 AM
#5
My Feedback: (11)
The fuel nipples on the pump are marked:
"IN" takes fuel from the tank.
"OUT" goes to the carburetor
"R" returns fuel not used back to the tank.
If you need a manual, we can send one to you, but we need to know which version. Does the carb have a velocity stack on the intake? If so, you have an FS-120 Surpass II. Does the pump have a large brass screw in the center, then you have the original version.
"IN" takes fuel from the tank.
"OUT" goes to the carburetor
"R" returns fuel not used back to the tank.
If you need a manual, we can send one to you, but we need to know which version. Does the carb have a velocity stack on the intake? If so, you have an FS-120 Surpass II. Does the pump have a large brass screw in the center, then you have the original version.
06-16-2016, 05:27 AM
#6
Thread Starter
Join Date: Jul 2005
Location: Auburn, AL
Posts: 410
Likes: 0
Received 0 Likes
on
0 Posts
Bax it looks like I must have an original version. A copy of the manual would be much appreciated. When you have time email me at [email protected] and I'll give mailing information. Thanks.
Rick H.
Rick H.
