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Date:  8-6-2018
Number of Hours:  4.00
Manual Reference:  
Brief Description:  Fuel Flow Test

With all the hoses now connected, it was time to check for leaks and do the fuel flow test. According to UL Power, the 350i engine needs 33L per hour at max power of 118hp. Also the infrormation in the latest maintenance manual says you should have 100L/hr from the return hose. After doing all the math, I needed to have 68oz/min at the return hose to meet UL Power requirements. Also 90-89B says you must have 125% of flow to engine at max power. Doing the math for this comes to 26oz/min of flow. So if the return is flowing at least 68oa/min then test should be successful for both cases. Disconnected return line from firewall whcih is shown in second photo. Funnel under return line routes fuel to bucket shown in first photo. The only problem I ran into was I thought 3-4 gallons of fuel in each tank would be enough for the test. However since the fuel lines were empyt, the pumps could not pull enough suction to get the fuel flow started. Also I had to bleed air form the lines to help get the flow started and added another 5 gallons of fuel to the tank. With the air out of the lines and 9 gallons of fuel in the tank, the fuel started flowing. The test was done on both pumps and both tanks and the numbers exceeded the target numbers calculated above. Tomorrow I will be the nose up and nose down flow test.
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Funnel goes into bucket

Funnel goes into bucket

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Return hose runs into funnel

Return hose runs into funnel

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