Will 55
New Member
- Nov 3, 2018
- 25
- Boat Info
- '87 230 Weekender
- Engines
- 5.7 L Alpha 1
quadrajet 4 barrel
Tow with: Toyota Sequoia 5.7L
I did my first manifold and riser replacement on my 5.7 Merc 260 and followed the torque specs precisely, bought a torque wrench specifically for the job.
The other side I paid a mechanic to do and change the starter at the same time. I asked him how many lbs he torqued the manifold and he was taken aback an got upset. He said, "Are you kidding me! It's on and it's not going to fall off." I asked his assistant who did the work and he just made up a # and said, "oh, about 90". I can't recall the exact torque specs but I think it was something like 35 or 45 on both manifold and riser. How critical is this? I guess it's better too tight than too lose. Being an '87 freshwater boat, this was the first change out, and will certainly be the last time this will ever need to be done. Anyone have the proper torque specs for manifold and riser on a 86-87 Merc 260?
The other side I paid a mechanic to do and change the starter at the same time. I asked him how many lbs he torqued the manifold and he was taken aback an got upset. He said, "Are you kidding me! It's on and it's not going to fall off." I asked his assistant who did the work and he just made up a # and said, "oh, about 90". I can't recall the exact torque specs but I think it was something like 35 or 45 on both manifold and riser. How critical is this? I guess it's better too tight than too lose. Being an '87 freshwater boat, this was the first change out, and will certainly be the last time this will ever need to be done. Anyone have the proper torque specs for manifold and riser on a 86-87 Merc 260?