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expiredearthdogmonster posted Dec 07, 2025 11:41 AM
expiredearthdogmonster posted Dec 07, 2025 11:41 AM

Costco Members: Firman 2900W / 3200W Peak Electric Start Dual Fuel Inverter Generator

+ Free Shipping

$300

$600

50% off
Costco Wholesale
162 Comments 39,213 Views
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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.
  • Note: Please see the original post for additional deals & give the WIKI and additional forum comments a read for helpful discussion.
Product Details:
  • 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.

Original Post

Written by earthdogmonster
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.
  • Note: Please see the original post for additional deals & give the WIKI and additional forum comments a read for helpful discussion.
Product Details:
  • 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.

Original Post

Written by earthdogmonster

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Top Comments

whodiini
1677 Posts
387 Reputation
I have owned this for several years. The positive is that it is extremely reliable and works well. The negative is that it is tricky to start, so it took me some time to figure out the subtleties of starting. I suspect the negative reviews all have to do with people who havent spent the time to understand this part. For those people, I would recommend a battery supply. I use propane because it runs cleaner. I dont use it except for extended power failures.

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.
FloridaKevin
590 Posts
177 Reputation
Seriously, read those reviews. Those people seem very incompetent, one review says they "hired two guys to unpack it, set it up and get it started and NOTHING!" I feel sorry for this company since they are getting a bad representation of this generator. The main issues seem to be with the units arriving with dead batteries or an oil leak. While those are very important issues, it seems the complainers are simply used to everything working 100% when in reality, a generator that is this mass produced is bound to ha e some issues, that's what the warranty is for.
beckfiveoh
63 Posts
26 Reputation
Propane is stable indefinitely and it doesn't carry the same issue of potentially gunking up a carburetor if fuel is left in the generator for extended periods of time. There is a reduction of output power with propane however, as it's labeled on the generator as to what to roughly expect on gasoline vs. propane.

161 Comments

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Dec 12, 2025 05:09 PM
215 Posts
Joined Dec 2011
dealhunter010Dec 12, 2025 05:09 PM
215 Posts
Quote from maroo0902 :
Anyone received with spilled gas on packaging? Mine just arrived and looks new, but there is a little gas inside of the tank. Is it normal? Seems testing purpose, but gas was all over the packaging I received yesterday.
Mine came that way as well when I received the package - a thin layer of oil covering the side of the generator and some on the inner part of the box. I did a bit of digging online and it might be from residual oil coming from the first run test before it's boxed up. They will drain the oil but it wouldn't be surprising if there are some left. Plus shippers not adhering to the "this face up" so it might be on its side which will inevitably leak out some oil.
Dec 12, 2025 08:54 PM
239 Posts
Joined Jun 2012
dbvolfan1Dec 12, 2025 08:54 PM
239 Posts
Wow, this has been a disappointment.
I got mine yesterday and while the box was worn from being dragged it wasn't overly damaged.
I open it up to find the plastic cover over the exhaust shattered into a lot of pieces... no biggie, it's just cosmetic.
I clipped the battery connector as instructed but the battery won't charge.
I remove the maintenance cover only to find out the battery isn't connected at all.
After fishing around I find a buried black wire but no red wire as the instructions indicate. I do however find a white one so I'll try that.
Then I find another large broken piece of plastic but I don't know what that goes to... then do on to find a loose hose dangling from the carb that I don't even know where it connects...
I goes I'll set aside another 2 hours tonight to try and start it!
Dec 12, 2025 09:18 PM
14 Posts
Joined Nov 2008
racerrandyDec 12, 2025 09:18 PM
14 Posts
Quote from TurboRabbit :
Received mine today, hooked the battery up at the point tied together with the large white barrow like connector then I noticed a wire not connected slightly to the right of the unit. I was curious after that discovery and started looking at the battery. Both positive and negative leads on the battery were not connected. If you buy one of these units, don't assume your battery is dead, check the connections. Battery is really hard to get to as the reviews states. My unit started without issues, I'll test it more later for generating power, simply wanted to put the PSA out there to check the battery connections. BTW 2021 build date.
Thanks SO much for this information. Received my generator and tried starting it, using the manufacturer's instructions...no start. Was ready to return it to Costco, then saw your post. Removed the rear and side covers and the battery wasn't connected. Connected the battery cables, turned the switch on, head the "click" when I switched to propane and the generator started right up.It's a keeper...now.BTW, my generator was built in October, 2020.Thanks Again!
Dec 12, 2025 11:16 PM
985 Posts
Joined Dec 2017
TurboRabbitDec 12, 2025 11:16 PM
985 Posts
Quote from racerrandy :
Thanks SO much for this information. Received my generator and tried starting it, using the manufacturer's instructions...no start. Was ready to return it to Costco, then saw your post. Removed the rear and side covers and the battery wasn't connected. Connected the battery cables, turned the switch on, head the "click" when I switched to propane and the generator started right up.It's a keeper...now.BTW, my generator was built in October, 2020.Thanks Again!
No problem, willing to bet that a lot of these units are arriving this way.
Dec 14, 2025 11:17 PM
140 Posts
Joined Nov 2021
TenderMorning986Dec 14, 2025 11:17 PM
140 Posts
Received mine yesterday. Same as others stated. Battery was not connected both at the battery point. A piece of plastic also broken but Cosmetics only. Put oil and connected the battery's. Heard click but haven't tried to start. Do I need to hook up the propane or gas to test this unit? How are u guys testing it?
Dec 15, 2025 12:56 AM
985 Posts
Joined Dec 2017
TurboRabbitDec 15, 2025 12:56 AM
985 Posts
Quote from TenderMorning986 :
Received mine yesterday. Same as others stated. Battery was not connected both at the battery point. A piece of plastic also broken but Cosmetics only. Put oil and connected the battery's. Heard click but haven't tried to start. Do I need to hook up the propane or gas to test this unit? How are u guys testing it?
Used gas with mine, once the tank runs out I plan on testing propane. I will also add to this so someone can correct me but I haven't noticed a gas shutoff which I don't care for. If you simply move the switch to propane the unit shuts off. I really wish it would run the carb bowl to empty so fuel is not sitting in the unit.
Dec 18, 2025 12:34 AM
264 Posts
Joined Jul 2006
sakuDec 18, 2025 12:34 AM
264 Posts
Quote from TurboRabbit :
No problem, willing to bet that a lot of these units are arriving this way.
omg u da true MVP TurboRabbit but whyyyyyyyyyyyyy Friman why

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Dec 18, 2025 12:37 AM
264 Posts
Joined Jul 2006
sakuDec 18, 2025 12:37 AM
264 Posts
Quote from TurboRabbit :
Received mine today, hooked the battery up at the point tied together with the large white barrow like connector then I noticed a wire not connected slightly to the right of the unit. I was curious after that discovery and started looking at the battery. Both positive and negative leads on the battery were not connected. If you buy one of these units, don't assume your battery is dead, check the connections. Battery is really hard to get to as the reviews states. My unit started without issues, I'll test it more later for generating power, simply wanted to put the PSA out there to check the battery connections. BTW 2021 build date.
Got mine working today. Shout out to TurboRabbit for good catch here. love to hear that purrrrrr 💥
Dec 18, 2025 05:57 PM
4,104 Posts
Joined Oct 2004
mrstangblbDec 18, 2025 05:57 PM
4,104 Posts
Quote from FeistyFlux :
what battery tender did you get?
Sorry that I just saw your question! It was one similar to this on Amazon: https://www.amazon.com/Automatic-...15&sr=8-25
Dec 23, 2025 06:51 AM
514 Posts
Joined Dec 2007
bazza36Dec 23, 2025 06:51 AM
514 Posts
Is there clear directions how to check if the battery is connected properly, and if not, how to connect the battery?
Today 06:18 PM
514 Posts
Joined Dec 2007
bazza36Today 06:18 PM
514 Posts
After some research, you can easily see if the battery is connected properly or not. Plug in the charger, if it stays green, it isn't charging the battery, because it's not connected properly. It will turn red when it is charging.
Took out the battery to connect, it keeps getting disconnected when putting it back in. Wires aren't long enough. Rediculous that we have to fix it when it's brand new.

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