FloatsLikeARock
Cadet
- Joined
- Jun 1, 2022
- Messages
- 21
Most inline fuel filters I've ever seen have an arrow indicating the direction of flow, This direction always has the filter element pointing into the flow. See the first picture below. That would seem to make sense because with this direction of flow, any dirt or crud will accumulate on the outside of the filter element. Even if it clogs, it will simply collapse in on itself, further blocking flow, instead of rupturing and dumping all the crud it had accumulated into the fuel system downstream.

The inline filter on my 2000 125 ELPTO (probably original to the engine) has no markings indicating intended direction of flow, but it is installed as I have described above, which I would consider to be the correct way. The Quicksilver filter replacement I ordered for it has an arrow on it indicating the direction of flow to be opposite of the normal direction of flow. See the photo below.

Some drawings in the service manual show the filter installed one way, and other drawings show it installed in the opposite direction.
Somebody is wrong. Which way would you install this filter?

The inline filter on my 2000 125 ELPTO (probably original to the engine) has no markings indicating intended direction of flow, but it is installed as I have described above, which I would consider to be the correct way. The Quicksilver filter replacement I ordered for it has an arrow on it indicating the direction of flow to be opposite of the normal direction of flow. See the photo below.

Some drawings in the service manual show the filter installed one way, and other drawings show it installed in the opposite direction.
Somebody is wrong. Which way would you install this filter?