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Honda GX 390 Engine Disassembly 

Jeff Kasprick
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Honda GX390.
Owners Manual: chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/cdn.powerequip...
Shop Manual: chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/www.red-d-arc....
Tech Manual: chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/www.trictools....
Repair Info: chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/www.honda-engi...

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29 авг 2024

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Комментарии : 64   
@frankpirrone6032
@frankpirrone6032 Год назад
Best gx390 rebuild video. I rebuilt motor following your assembly and disassembly videos and saved 400 in labor 😊 Thank you!
@MarkHenderson-fc4by
@MarkHenderson-fc4by Год назад
I've used this sprayer several times now on brick pavers, a wood deck, patio, and a driveway. ru-vid.comUgkx43QMbQqu67IZadu9ou8Sg1BdrunMRNqX It has performed as expected on all surfaces. For larger areas like the decks and patios, I think I will be looking into a surface cleaner attachment to speed up the job, or at least make it a little easier. Hose and sprayer connections are tool-less, tight, and quick. I used the yellow nozzle on the concrete/brick surfaces, and the pressure was adequate for cleaning those surfaces.I am disappointed that these units are still being shipped with a nozzle storage holder that allows them to vibrate out of the holder way too easily and become lost, but I don't want to knock off a star for that reason. The functional part of the washer works very well, so I would recommend this product.
@JosephSmith-sg9yv
@JosephSmith-sg9yv Год назад
Thanks I have a low oil sensor bad on a GX390 which I disconnected so engine will run. To much work to replace ,thanks for showing it internal inside engine
@dirtyaznstyle4156
@dirtyaznstyle4156 5 месяцев назад
I wish the ones I take apart look anything as good as those 😂
@jtkasprick
@jtkasprick 5 месяцев назад
Well we did start with new and it has never been on anything to make it work. Ya I wish they were always that clean, lol
@Funckinnutcase
@Funckinnutcase 5 месяцев назад
Fantastic, Crystal clear video. Thank you!
@WoodchuckCanuck
@WoodchuckCanuck 2 года назад
I was wondering why so much heat was coming out of the side of our engine. You're video explaining the fan pushing air through to help cool the block makes total sense. I thought a gasket might have blown.
@jtkasprick
@jtkasprick 2 года назад
All engines produce heat because of combustion. The harder you work an engine the more heat it will produce. You will either have an air cooled, fan cooled (like this one) or a liquid cooled system. These three are the most common. A cooling system is vital to prevent damage from overheating.
@WoodchuckCanuck
@WoodchuckCanuck 2 года назад
@@jtkasprick We have a 390 on an EastonMade 12-22 firewood splitter. Early model, the newer one's have fan coolers on them.
@omarperich1560
@omarperich1560 2 года назад
Thank you for your time of the instructions very helpful , blessings
@AliMardanNaqvi
@AliMardanNaqvi 3 месяца назад
I just bought a new block from honda for my 390
@valeriaobregon2752
@valeriaobregon2752 Год назад
Que buen motor ,,,es honda no hay con que darle
@carloscristianbrionestirad7638
@carloscristianbrionestirad7638 2 года назад
Español ? Subtitulos o traduccion ? Por favor gracias 👏🏻👏🏻👏🏻
@joshsundiwa
@joshsundiwa 3 месяца назад
well explained thanks for sharing
@RoddyMcAskill
@RoddyMcAskill 6 месяцев назад
Very informative. Thank you. Was that residual oil still left in the bottom of the case after draining?
@jtkasprick
@jtkasprick 5 месяцев назад
Yes it was
@holgerf.8423
@holgerf.8423 7 дней назад
Nice Video, i couldn't figure out where the decompression thing is. must be somewhere on the camshaft?! Let me know if anyone does know that. Thanx
@jtkasprick
@jtkasprick 7 дней назад
@@holgerf.8423 it is on the camshaft. When viewing with the side cover off it on the back of the cam gear.
@user-jr2kc6yx8e
@user-jr2kc6yx8e 3 месяца назад
I watched this movie well. I have one question. After removing the flywheel, there is no charging coil???😊
@jtkasprick
@jtkasprick 3 месяца назад
This engine does not have a charging coil.
@vanover69
@vanover69 Год назад
very nice video...I have a issue I hope you can help me with. I have a Honda GX390 on a generator. I replaced the crankcase shaft oil seal as it was leaking. I installed in flush with the engine case. After running for awhile it started leaking again. I thought the seal needed to be counter sunk a bit so I replaced it again. And after running for a short time it has started leaking again. Im not sure where to go from here. Both times replacing the seal I used steelwool to clean the shaft and it seems smooth with no defects. Any advice would be great! Thanks in advance
@jtkasprick
@jtkasprick Год назад
I was thinking maybe you have excess crankcase pressure. I was going to do a video on this but haven't had time. There is a passage that goes from the crankcase along the cylinder and into the cylinder head. When the piston is traveling down it will increase the crankcase pressure. When it travels up it will decrease the pressure. The passage allows outside air to move in and out of the crankcase. Similar to a PCV system on a vehicle engine. If you take the valve cover off you should see a small round hole near the valves, not where the pushrods go. Closer to the top. If you pull the engine over you should feel air coming out as the piston moves. If it is plugged this could cause increase in pressure and force oil out of the seal.
@djezoh
@djezoh 2 года назад
This is really cool
@user-ql5vk6qh4r
@user-ql5vk6qh4r Год назад
You don't need a puller to remove these flywheels, just put the nut level with the thread end and then one solid tap with a lump hammer will remove it.
@jtkasprick
@jtkasprick Год назад
I will give that a try. We teach using pullers so our nubies know what they are and how to use them.
@user-ql5vk6qh4r
@user-ql5vk6qh4r Год назад
@@jtkasprick Great, hope it helps, I only work on new engines, but I've probably removed 5000 flywheels like this over the years.
@coltonashcraft3384
@coltonashcraft3384 2 года назад
Great explanation thank you
@sivucit
@sivucit 7 месяцев назад
hi what size and model and brand is 3 jaw puller. if you are using snap on or OTC pls do provide me the 3 jaw puller name and model
@raygarcia8989
@raygarcia8989 Год назад
Thank you very much big man thank you for your nice tutorial 👍 I really appreciate you sharing your great knowledge.
@williamwaters4506
@williamwaters4506 Год назад
Nice job.
@ProCleanServices
@ProCleanServices 2 года назад
I have set up my trailer so that it’s difficult to change the oil on the gx390. Would a suction oil extractor be efficient? Is there access to the bottom of the pan from the dipstick? Just want to make sure I don’t leave too much residue behind at the bottom by not using the drain plug
@jtkasprick
@jtkasprick 2 года назад
A suction extractor may work. But you are right to think it may not get it all. The dipstick opening goes straight to the bottom of the sump (pan).
@devinedwards9079
@devinedwards9079 11 месяцев назад
Great video and explanation. How can I send you a PM on information on your sponge organizer for nuts & bolts.😀
@jtkasprick
@jtkasprick 11 месяцев назад
Email me at jtkasprick@gmail.com. it is 3d printed. I have the file if you would like it.
@64Zbot
@64Zbot 11 месяцев назад
Any difference in the black shrouded GX 390s ? Looking at a woodsplitter with one on it...thx
@jtkasprick
@jtkasprick 11 месяцев назад
I think they are the same.
@albertmarin4314
@albertmarin4314 Год назад
Good video
@MrShaunys1210
@MrShaunys1210 2 года назад
Could you leave all the flywheel etc fitted if you need to inspect the tappets/crank?
@jtkasprick
@jtkasprick 2 года назад
You could. The flywheel would have to come off if you were removing the crankshaft.
@MrShaunys1210
@MrShaunys1210 2 года назад
@@jtkasprick cheers mate 👍 my generator started ticking after long use in the heat and looks to be burnt around the exhaust valve in the valve cover 😭
@dingakholhring5029
@dingakholhring5029 2 года назад
What is the final rpm of this machine after the gear transmission?
@jtkasprick
@jtkasprick 2 года назад
I believe the reduction ratio is 6:1. 6 revolutions of the crankshaft would result in 1 revolution of the PTO
@mixedberries4937
@mixedberries4937 2 года назад
Thanks
@Yeti573
@Yeti573 Год назад
Do you happen to know if Honda has an electric start kit for a 2012 or later Honda GX390. All the kits I have found online (Amazon, Ebay, etc.) are for a 2011 or earlier model year. I know Honda currently offers versions of the GX390 with electric start, but cannot for the life of me find a kit for one that didn't come with from the factory. I know the flywheel and I believe the coil is different on the 2012 and later models. SO FRUSTRATING!!!!
@jtkasprick
@jtkasprick Год назад
Sorry I can't help. I have never actually looked for a kit.
@Yeti573
@Yeti573 Год назад
@@jtkasprick Dang! Thank you for responding so quickly.
@fronkbobjohn519
@fronkbobjohn519 Год назад
The cam shaft won’t come out for me what do I do?
@jtkasprick
@jtkasprick Год назад
There are no bearings supporting the cam. It is the cam journals in the aluminum case and front cover. Did you loosen the valve adjustment nuts to remove any tension on the valve train?
@user-sj6dg1kj7o
@user-sj6dg1kj7o 10 месяцев назад
What causes Gx390 to swallow fuel
@jtkasprick
@jtkasprick 10 месяцев назад
Are you meaning using an excessive amount of fuel?
@user-sj6dg1kj7o
@user-sj6dg1kj7o 10 месяцев назад
Yes excessive amount of fuel..
@jtkasprick
@jtkasprick 10 месяцев назад
I am assuming no external leaks. Is it running rich?
@jtkasprick
@jtkasprick 10 месяцев назад
What are you using it for?
@robertlevins8120
@robertlevins8120 Год назад
re coil hard to pull on my Honda GX 390 8 GPM pressure washer only 7 mos. old
@jtkasprick
@jtkasprick Год назад
There is a decompression valve located on the rear of the camshaft on the exhaust lobe. It lowers compression pressure for starting. Maybe it is not working properly.
@frankpirrone6032
@frankpirrone6032 Год назад
Are you holding the trigger open on pressure gun? Once the pump builds up pressure in the hose, that engine will feel locked.
@PeggyDore
@PeggyDore 7 часов назад
Could you send me the file for your parts organizer! Need for homeschooling!
@muratturant.a.6.s.m.t866
@muratturant.a.6.s.m.t866 Год назад
hello i have 11 hp engine i have two yellow wires coming from carburetor! where should i connect them?
@jtkasprick
@jtkasprick Год назад
What is the model number? Is it a gx?
@muratturant.a.6.s.m.t866
@muratturant.a.6.s.m.t866 Год назад
@@jtkasprick modelini bilmiyorum jenaratörden çıkma motor
@wardyvillaruzferolino7756
@wardyvillaruzferolino7756 2 года назад
giveaway?🙂
@jtkasprick
@jtkasprick 2 года назад
Unfortunately no.
@PaulHigginbothamSr
@PaulHigginbothamSr Год назад
Your entire video so far is soundless. Like one of those old talkies. Not even muzak.
@cliffhicks8849
@cliffhicks8849 Месяц назад
I have a problem with sound on this video as well. Only getting left (mono) channel. And quality is low. It's the only disappointing this about this excellent video.
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