Fuel pump flush

Information and questions on GL1100 Goldwings (1980-1983)
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Joined: Sat Jun 16, 2012 8:28 pm
Location: Parker, Pa
Motorcycle: 1983 Gl 1100 Aspencade

Fuel pump flush

Postby vaughn » Sat May 23, 2015 7:15 pm

While waiting for my carbs to get back from Pistol Pete's I want to flush the fuel pump. When I remove the top will I need a new gasket? Are they still available from Honda? If not maybe Pistol Pete's will have them. I got new fuel lines already.

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Motorcycle: 1982 CX500 Turbo (restoration project)
1981 GL1100 Interstate (sold)
1988 GL1500

Re: Fuel pump flush

Postby Aussie81Interstate » Sat May 23, 2015 8:43 pm

Just attach a clean fuel supply to the intake hose of the petrol pump and run the starter motor - anything that comes out of the output hose should be captured in a glass jar - to see if it is contaminated. You might want to run this more than once if it is badly contaminated.

Make sure you put in a nice new clean fuel filter between the tank and pump when you reinstall the carbs. It would be a shame to pollute the carbs with contaminant from your fuel tank or pump.

No need to remove the top of the pump - unless you know you have a pump problem.

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Motorcycle: 1975 GL1000 (gone)
1980 GL1100I (with '77 1000 engine)
1996 GL1500 SE

Re: Fuel pump flush

Postby spiralout » Sun May 24, 2015 9:12 am

No, you won't need a new gasket. I've cleaned out the pumps on my 1000 and 1100. It's no problem at all, just pay attention to which way the check valve is fitted when you're disassembling it. If I paid PPS that much to do my carbs, I'd definitely take the pump apart to make sure there were no contaminants before I installed the carbs, not just pump clean gas through it. I'd make sure the tank was spotless, too, and even replace the fuel lines.

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