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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 39,197 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 09, 2025 09:56 AM
606 Posts
Joined Dec 2007
TorGa3iGhTDec 09, 2025 09:56 AM
606 Posts
Deal is dead? Oos
Dec 09, 2025 03:21 PM
140 Posts
Joined Nov 2021
TenderMorning986Dec 09, 2025 03:21 PM
140 Posts
Bummer oos in my area
Dec 09, 2025 07:01 PM
10 Posts
Joined Oct 2017
kraberpDec 09, 2025 07:01 PM
10 Posts
Out of stock
Dec 09, 2025 10:44 PM
1 Posts
Joined May 2023
CoralTent6845Dec 09, 2025 10:44 PM
1 Posts
In for one! Ordered one yesterday. Thanks for the great deal OP. Was debating on going solar or dual fuel generator for a travel trailer build. This generator, at this price, made the decision for me. Thanks again!
Dec 10, 2025 12:24 AM
77 Posts
Joined Jan 2019
amerikanistDec 10, 2025 12:24 AM
77 Posts
How do I check availability? Shows out of stock for Redmond locations... Would they ship this out of state?
Dec 10, 2025 07:41 AM
62 Posts
Joined Nov 2018
OliveTest4274Dec 10, 2025 07:41 AM
62 Posts
Quote from C17chief :
Not to mention supply. Maybe not so much propane, but natural gas on the tru fuel ones. For example if using for home backup and you have gas, and an outdoor tap for like say a grill or something or just put a dedicated on in, you can just attach a line to your gas service and run indefinitely vs storing or later finding gasoline to keep it going.
And in an emergency gasoline is often hard to find but propane exchanges are everywhere and don't run out.
Dec 10, 2025 11:55 AM
20 Posts
Joined Nov 2014
maroo0902Dec 10, 2025 11:55 AM
20 Posts
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.

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Dec 11, 2025 12:39 AM
47 Posts
Joined Jan 2010
charmandealDec 11, 2025 12:39 AM
47 Posts
Quote from whodiini :

For me, the trickle charger that came with the new unit does not have enough juice with a dead battery to get the solenoid to click. You need to charge the battery first with the trickle charger for a few hours, and then once the solenoid clicks, you can start the generator.

For people who run it every few months, there arent much hoops to get this to work. Its people like me who have this to use in an emergency or extended power failure, which may occur once a year or 2 and dont want to start it up every 2-3 months nor trickle charge it all the time that I did the external battery mod. My experience with SLA batteries is that they last about 3-4 years before needing to be replaced. Since I use SLA batteries in my UPS and always have a spare, keeping a fresh one for emergencies to hook up is very easy,
Does the battery need to be charged before the first use?
Dec 11, 2025 02:19 AM
1,677 Posts
Joined Jan 2006
whodiiniDec 11, 2025 02:19 AM
1,677 Posts
Quote from charmandeal :
Does the battery need to be charged before the first use?
Usually it is ok because when new, it arrives from the factory disconnected internally. If it is disconnected, it should last about a year with a charged up brand new battery disconnected. The instructions say open the panel and connect up the battery, put oil in the engine. Most people including myself dont disconnect the battery again, and if so, you need to either run it every 2-3 months or charge up the battery every 2-3 months.
1
Dec 11, 2025 02:28 AM
985 Posts
Joined Dec 2017
TurboRabbitDec 11, 2025 02:28 AM
985 Posts

Our community has rated this post as helpful. If you agree, why not thank 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.
1
Dec 11, 2025 07:35 AM
16 Posts
Joined Nov 2015
grictavia43Dec 11, 2025 07:35 AM
16 Posts
Received today as well. Put the oil, connected the cables but could not fire it up. Plugged it in for battery to charge. Will try tomorrow morning.
1
Dec 11, 2025 12:51 PM
985 Posts
Joined Dec 2017
TurboRabbitDec 11, 2025 12:51 PM
985 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.
Pretty sure they briefly check for start so I wouldn't be surprised about gas or oil residue. I don't think they put gas in the tank, guessing on the line they can directly connect a line to the carb.
Last edited by TurboRabbit December 11, 2025 at 08:26 AM.
Dec 11, 2025 06:14 PM
16 Posts
Joined Nov 2015
grictavia43Dec 11, 2025 06:14 PM
16 Posts
Quote from grictavia43 :
Received today as well. Put the oil, connected the cables but could not fire it up. Plugged it in for battery to charge. Will try tomorrow morning.
Unfortunately I couldnt get it to start up in the morning either. When I plug it in to the charger I can hear the clicks and when removed from the charger it does not click when I press the power button. Manual mentions don't start when the unit is plugged in. I guess I'll contact with Firman to see what they will advice.
Dec 11, 2025 07:24 PM
16 Posts
Joined Nov 2015
grictavia43Dec 11, 2025 07:24 PM
16 Posts
Quote from grictavia43 :
Unfortunately I couldnt get it to start up in the morning either. When I plug it in to the charger I can hear the clicks and when removed from the charger it does not click when I press the power button. Manual mentions don't start when the unit is plugged in. I guess I'll contact with Firman to see what they will advice.
Dead battery, they are sending a replacement unit with instructions. They have good customer support, very responsive. Let's see how easy or tricky its gonna be to do the swap.

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Dec 11, 2025 07:46 PM
985 Posts
Joined Dec 2017
TurboRabbitDec 11, 2025 07:46 PM
985 Posts
Quote from grictavia43 :
Dead battery, they are sending a replacement unit with instructions. They have good customer support, very responsive. Let's see how easy or tricky its gonna be to do the swap.
Guessing you need to remove the whole side panel. Let us know how you removed it. Tried to figure that out so I could avoid using pliers to plug mine back in.

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