Item 1 of 2
Item 1 of 2
expiredearthdogmonster posted Dec 7, 2025 11:41 AM
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+ Free Shippingat Costco Wholesale
Deal Details
Costco Wholesale has for Members: Firman 2900W Running / 3200W Peak Electric Start Dual Fuel Powered Inverter Generator (WH02942F) for $299.99. Shipping is free.
Thanks to community member Cwhomer for finding this deal.
Thanks to community member Cwhomer for finding this deal.
- Note: Please see the original post for additional deals & give the WIKI and additional forum comments a read for helpful discussion.
- The Firman WH02942 is a portable, RV-ready generator designed for quiet, efficient power on the go. With 3,200 starting watts and 2,900 running watts on gasoline, or 2,900 starting watts and 2,600 running watts on propane, it gives you flexibility and reliability in any situation.
- 171 cc dual fuel engine with low oil shut off and cast iron sleeve
- 1.8 gallon tank provides 9 hours of runtime. Propane tank not included
- RV ready multi feature control panel with covered outlets
- 5.5" Heavy Duty Never-Flat wheels and High Leverage U-shape Folding Handle
- Largest tank in industry with extended run-time (less re-fueling).
- Quiet muffler (Whisper Series) with USDA FS certified spark arrester.
- 3-in-1 Data-Minder monitors running hours, voltage and frequency in conjunction.
- Bonus accessories including engine oil, oil funnel, tool kit, battery float charger, LPG regulator/hose and battery charge cable.
- Included battery for your convenience.
- Limited lifetime warranty.
Editor's Notes
Written by RevOne | Staff- Offer valid from 12/7/25 through 12/13/25, while supplies last.
- If you don't have a Costco Warehouse Membership, you can sign-up here.
- Our research indicates that this deal is $150 less (33% savings) than the next best available price from a reputable merchant with prices starting from $449.99 for Certified Refurbished units at the time of this posting.
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Costco Wholesale has for Members: Firman 2900W Running / 3200W Peak Electric Start Dual Fuel Powered Inverter Generator (WH02942F) for $299.99. Shipping is free.
Thanks to community member Cwhomer for finding this deal.
Thanks to community member Cwhomer for finding this deal.
- Note: Please see the original post for additional deals & give the WIKI and additional forum comments a read for helpful discussion.
- The Firman WH02942 is a portable, RV-ready generator designed for quiet, efficient power on the go. With 3,200 starting watts and 2,900 running watts on gasoline, or 2,900 starting watts and 2,600 running watts on propane, it gives you flexibility and reliability in any situation.
- 171 cc dual fuel engine with low oil shut off and cast iron sleeve
- 1.8 gallon tank provides 9 hours of runtime. Propane tank not included
- RV ready multi feature control panel with covered outlets
- 5.5" Heavy Duty Never-Flat wheels and High Leverage U-shape Folding Handle
- Largest tank in industry with extended run-time (less re-fueling).
- Quiet muffler (Whisper Series) with USDA FS certified spark arrester.
- 3-in-1 Data-Minder monitors running hours, voltage and frequency in conjunction.
- Bonus accessories including engine oil, oil funnel, tool kit, battery float charger, LPG regulator/hose and battery charge cable.
- Included battery for your convenience.
- Limited lifetime warranty.
Editor's Notes
Written by RevOne | Staff- Offer valid from 12/7/25 through 12/13/25, while supplies last.
- If you don't have a Costco Warehouse Membership, you can sign-up here.
- Our research indicates that this deal is $150 less (33% savings) than the next best available price from a reputable merchant with prices starting from $449.99 for Certified Refurbished units at the time of this posting.
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Top Comments
So here are the subtleties in starting it. First the battery dies if connected up and unused for a while. You need to connect it up to test it at the beginning and it requires you to open the front panel. So what I did was to remove the battery and replace the leads with RV type leads. Then make a connector with RV type leads to the spade leads of a battery, which I keep charged by using it in a UPS. You absolutely need a live battery to start with propane because the valve on the propane gas connection is electrically powered, which you need to plug into the front panel once the battery is connected. Second, the manual pull start only works with gas and not propane WITH A DEAD BATTERY, so there is no other option if you want to run with propane and your battery is dead. As a poster pointed out, pull start works if your battery is not dead, but electric start also works if your battery is not dead. Once I did that, it starts like a champ whenever I need it. BTW, removing the battery and replacing it is a pain, which is why I used the external connection - dont need to remove the front panel to connect and disconnect the battery between uses.
My extended backup plan for now is a battery backup to run a refrigerator and microwave, network and computer, plus TV and a few lights for several hours. Then if it goes beyond that, use the generator to recharge the battery backups, since that only takes an hour to recharge then.. In the future, I may just get a transfer switch for a few circuits in the house and the heater. My current strategy works fine in the summer and around a day in the winter. After a day in winter, it starts getting pretty chilly at night, which is why a transfer switch is in the future.
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162 Comments
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Other way would be a 'generator interlock' (google that for more info) to feed this directly into your panel, but only half of your breakers (left or right side) will be powered in that case.
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Whats trickle charging? Im guessing you mean the battery for the electric starter?
https://www.costco.com/p/-/diehar...ue&nf=
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