Reply To: Fuel Pump Conversion Issue

[drifter]

Update…..Not one to give up, I pulled out my 1958 Johnson 7.5hp and made the exact conversion using the blocked right hand port and the same fuel pump. The pump worked well and the engine ran great, but, there was still some fuel mix entering the pulse line. No where near the amount that was seen in the 5.5hp Johnson. The fuel mix never actually oozed out of the gold center vent when on the 7.5, but the vent did get wet and the fuel mix was seen traveling up the pulse line to the B&S pump.
Since the 7.5 has removable bypass covers, I decided to tap off of the bypass pulse. Using this method of obtaining a pulse worked perfectly. The pulse line remained clean. The pump easily pumped fuel through a 7 foot line with the tank sitting on the ground. After a 20 minute run almost all at slow idle, there was not a hint of a problem.
This conversion does not require any disassembly of the intake plate. Just blocking off the pressure line. Conversion back to two line system is as fast as blocking the bypass line and connecting the two line fuel/air fitting back up.