Riley C
Petty Officer 1st Class
- Joined
- Dec 23, 2018
- Messages
- 239
Wanted to share some information of an OMS pump with a stuck piston inside the chamber. It was a 98 pump.
Photo shows the scoring inside the chamber where they fused. This definitely would have caused failure if it had been fitted.
I was lucky enough to inspect this secondhand pump and pull it down before considering fitting it.
The Teflon seal had fused with gunk/oil, made it near impossible to pull the pump down. With our braking the piston.
Also show a photo where pressuring the system and the check valve on the oil side will fail. Letting fuel loose prime, making people believe they have an air leak.
On my original unit, The oil inlet screen had also popped off after removing from the fuel housing. I think this may have cause my over oil. As I had no issue of loosing prime/air leak any where else.
My point is I don’t rust the plastic fitting OMC designed here. Surely they could have engineered this better.
I’m now just going premix, to feel at ease. Do the swap over guys just go 50:1 or 60:1 like the OMS did?
Just want to confirm, disconnecting the OMS harness kill the tacho signal or the vac and overheat warning?
Just be careful out there guys. Service your parts and inspect. More so if you run OMS/VRO
Photo shows the scoring inside the chamber where they fused. This definitely would have caused failure if it had been fitted.
I was lucky enough to inspect this secondhand pump and pull it down before considering fitting it.
The Teflon seal had fused with gunk/oil, made it near impossible to pull the pump down. With our braking the piston.
Also show a photo where pressuring the system and the check valve on the oil side will fail. Letting fuel loose prime, making people believe they have an air leak.
On my original unit, The oil inlet screen had also popped off after removing from the fuel housing. I think this may have cause my over oil. As I had no issue of loosing prime/air leak any where else.
My point is I don’t rust the plastic fitting OMC designed here. Surely they could have engineered this better.
I’m now just going premix, to feel at ease. Do the swap over guys just go 50:1 or 60:1 like the OMS did?
Just want to confirm, disconnecting the OMS harness kill the tacho signal or the vac and overheat warning?
Just be careful out there guys. Service your parts and inspect. More so if you run OMS/VRO
