Kroller CV15S won't start without staring fluid

[slomo]

model CV15S 2005 or 2006 era
spec 41590
serial 3005604141

38" Simplicity tractor style rider. Sitting for 10 years. Tank are carb are clean. Fires/runs only with starting fluid.

This has a block mounted fuel pump I suspect is bad. Fuel is pumped into a hard line over top of the engine into carb. Walbro carb has a restrictor on the fuel inlet. Small hole is all as in maybe 3 bread ties large. Tried bypassing the fuel pump via gravity. Tank is higher than carb. Not enough fuel volume to run it. Guessing it needs a little pressure to fill the bowl and run?

Again it runs with starting fluid. Will keep running if you pulse spray some juice into the carb. Engine is starving for fuel . Can someone verify this engine NEEDS the fuel pump please? Thanks in advance.

 

[StarTech]

Might just need a good carburetor cleaning.

 

[slomo]

Tank are carb are clean

 

[ILENGINE]

If it has the fuel solenoid on the carb make sure it is retracting when the key is turned on. Sometimes they can get gummy and stick with fuel residue.

 

[slomo]

Question is does this engine REQUIRE a fuel pump to run? As in the factory design? Gravity supply lacks volume into carb due to carb inlet restriction.

 

[slomo]

If it has the fuel solenoid on the carb make sure it is retracting when the key is turned on. Sometimes they can get gummy and stick with fuel residue.

Verified it retracts with key on.

 

[slomo]

Fuel pump 12 559 02-S is around 35 bucks. Figured the pump is trashed up a bit from sitting 10 years.

 

[Scrubcadet10]

Pull the outlet off of the fuel pump and see how much volume it pumps, or if it pumps,

 

[Hammermechanicman]

Yes it needs the pump. The Kohler pump is kinda expensive. I use one from stens. Testing the pump is not easy because of the hard line from pump to carb isn't easy to disconnect.

 

[slomo]

Pull the outlet off of the fuel pump and see how much volume it pumps, or if it pumps,

This was my next test. Check volume out of the pump. Figured the diaphragm was all messed up from sitting 10 years. Looks like a simple ford or chevy v-8 fuel pump. Same working principal anyway.