Itinerant Air-Cooled

Bump -- Anyone have any thoughts on the safety of my setup?

I'd love to tell you it's all good, but I just don't know and I'd hate to give mis-information. I looked for a schematic of that type of relay, but didn't find anything other than "hook this wire to that and it just works". I was hoping to find an actual schematic so I could figure out what 31b does. Further, I can't imagine feeding a pulsing voltage from the coil to another coil (internal to the relay) as being a good idea. So... I don't know. Maybe an actual schematic of the relay will surface and we can take a look-see. Until evidence to the contrary is presented, Hal's word is pretty durn good.

Another option for mounting the relay would be JB Weld a strong magnet to the back of the relay and stick it up on the firewall near the regulator. This way it could be pulled down easily if need be.

72Hardtop wrote:
Another option for mounting the relay would be JB Weld a strong magnet to the back of the relay and stick it up on the firewall near the regulator. This way it could be pulled down easily if need be.

I should have thought of that. It would have been way better with no drilling. Oh well they are tiny holes.

Oregon72 wrote:

72Hardtop wrote:
Another option for mounting the relay would be JB Weld a strong magnet to the back of the relay and stick it up on the firewall near the regulator. This way it could be pulled down easily if need be.

I should have thought of that. It would have been way better with no drilling. Oh well they are tiny holes.

With a running engine, ground the green wire from the coil #1 that goes to the distributor. Fuel pump stop along with engine?
Kudos to Hal.
ColinLearningEveryDayWhenHeShutsUpForALousyMinute

Warning - Old thread revival ---

Got a question for ya'll --- If my bus has not been driven for several days, I find the fuel appears to have evaporated out of the carbs and upon cranking, the fuel pump doesn't seem to be filling the bowls so it doesn't fire up. A little gas poured down the carbs gets going enough to get it started and once it is up and running I can drive it all day long. As long as the bus doesn't sit un-driven for a number of days, it will start and run fine. Do you think there is something wrong with my fuel pump relay or the way I have everything hooked up (see diagram above)? It seems to be something that has just started recently.

Now that I think about it, I'm gonna go check the in-line fuse from the battery to the relay and see if that is OK - I'll feel like an idiot if that is what it is.

Oregon72 wrote:Warning - Old thread revival ---

Got a question for ya'll --- If my bus has not been driven for several days, I find the fuel appears to have evaporated out of the carbs and upon cranking, the fuel pump doesn't seem to be filling the bowls so it doesn't fire up. A little gas poured down the carbs gets going enough to get it started and once it is up and running I can drive it all day long. As long as the bus doesn't sit un-driven for a number of days, it will start and run fine. Do you think there is something wrong with my fuel pump relay or the way I have everything hooked up (see diagram above)? It seems to be something that has just started recently.

Now that I think about it, I'm gonna go check the in-line fuse from the battery to the relay and see if that is OK - I'll feel like an idiot if that is what it is.

I was set up with the relay running off the alternator warning light circuit on the Road Warrior.
Car started even after a winter sit. However, after doing carb work where the bowls were drained, yes, I would have to prime the system. I already had the relay located where I could just run a simple jumper wire from the coil or battery to the #87 terminal of the relay, run the pump for five seconds and yer gud. Safer by far than running gas into the carbs
Colin

Old I know...looking at this thread again. I don't see an issue with the pressure of his mechanical pump. Solex carbs are built to tolerate no more than ~ 4psi at the inlet. His pressure in the video was fine and shouldn't have been an issue. The mechanical pumps on the 72 buses would generally yield what his findings were...perfectly normal.

It's also not difficult at all to remove a mechanical fuel pump on a 1972 bus. In fact, its a 5 minute job (engine in place).

72Hardtop wrote:Old I know...looking at this thread again. I don't see an issue with the pressure of his mechanical pump. Solex carbs are built to tolerate no more than ~ 4psi at the inlet. His pressure in the video was fine and shouldn't have been an issue. The mechanical pumps on the 72 buses would generally yield what his findings were...perfectly normal.

It's also not difficult at all to remove a mechanical fuel pump on a 1972 bus. In fact, its a 5 minute job (engine in place).

The Bentley manual says 5 psi for the dual carb buses. Doesn't say "3-5" like the earlier buses, says "5" psi, and I ain't gonna second guess that. The only time I flooded my crankcase with gasoline was when I had inadequate pressure to make sure the fuel level *pressed* the float *up* to *seal* the needle valve closed.
Colin