Model #1674-0 GENERAC Power Washer, Gas

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  • Pump
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Question and Answers

Q:

Where can I get a replacement fuel tank for Generac power washer model 1647-0 ? 1674-0 Generac Pressure washer

A:

Searspartsdirect.com is always a great resource to find the answers to your parts questions. Your Sears partsdirect expert will research your question and respond within two business days but usually sooner. Thank you for using Searspartsdirect.com!

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Alina -
June 29, 2013
A:

Thank you for choosing Sears Parts Direct. I can understand how important this tank is for the power washer. I recommend you giving us a personal call at 1800-366-7278. This way one of my Parts Trusted Advisors can set up a personal research for this tank. Thank you for choosing Sears and we hope to get that tank for you very soon!

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Samantha A -
Sears Technician
June 29, 2013
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Q:

My pressure washer motor starts easy and runs fine but why does the washer slow down and stall after a few minutes of use?

A:

I am sorry that you are having some difficulties with your pressure washer and I will be happy to help. I did some research and I was able to find a link that will provide you with some good information. I hope this helps with your pressure washer troubles while you wait for your expert response.

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Joseph P. -
September 10, 2012
A:

Joseph P., Thank you for the link as I did go to and read it. Its writer believes the unloader is the problem but the center pin in my unloader moves freely as does the ball in the manifold. I like mention of adjusting the screw for the unloader but have not tried it is yet as I am waiting for other replies before I reassemble the pump. If I other comments are similar and I reassemble, I will definitely take your help link into consideration. Thank you, Dan

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Daniel -
September 10, 2012
A:

Thank you for your question on the engine stalling when running a few minutes.

I think that the unloader valve is the problem with the pressure washer even though it seems to be okay.

I would suggest putting pump all back together and remove the nozzle off the end of the wand and then hold the wand open and run the engine. If it does not stall the engine the whole time you have the trigger pulled then I would say that the unloader is the problem.

It is still stalls it may be that the engine is running out of fuel and starving.

Since you have it apart I would suggest replacing the seal and pump and check valve kits or I am afraid you will be taking it apart again.

If you can get the pump put back together please try this to see it that test tells us anything.

Sam A.

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Sam A -
Sears Technician
September 11, 2012
A:

Thanks Sam for the answer. I'll have time this weekend to put things back together and test as you suggested. I'll let you know how it goes. Dan

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Daniel -
September 14, 2012
A:

Sam, I would say you are correct. I put the whole thing back together and ran it without the nozzle, had no problems at all. I put the nozzle back on and tried again and had super pressure for about a minute. The motor began bogging down and pressure decreased, it finally stalled. Even after several times of restarting the washer the pressure never recovered. However, I was able to keep the motor from stalling by adjusting the unloader spring nut and center screw but the pressure still never recovered. What are your thoughts there if anything different from your original answer? At this point the cost of an unloader and a kit or two equals a new pump. It isn't worth repairing this one. Thanks, Dan

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Daniel -
September 16, 2012
A:

Thank you for the update on the pressure washer. I would suggest trying to adjust the unloader valve until you get your pressure back. But if it stalls the engine again then I would at least replace the unloader since it seams to work otherwise. Thank you. Sam A.

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Sam A -
Sears Technician
September 17, 2012
A:

Sam, I tried to adjust the unloader by turning clockwise to increase pressure. I turned approx. 1 full turn with very little increase in pressure but valve began to snap (is that what's referred to as chatter?). Turning back counterclockwise just put it back where it was. So it seems that adjusting the valve is not an option. Do you feel that replacing the unloader valve only (keeping my manifold) will solve my problem? Thanks, Dan

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Daniel -
September 17, 2012
A:

Thank you for the update Daniel. I think it certainly is worth a try. Otherwise it sounds like it is pretty much useless if you cannot get any pressure. I would not suggest putting a lot of money into it but the unloader valve may solve you problem. Sam A.

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Sam A -
Sears Technician
September 18, 2012
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