Abby’s Guide > Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) > Discussions > Spit, Sputter, Cough,Blemph
Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions |
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mml4
 
Snow is good,
Deep snow is better!
Joined: Dec 31, 2003
Points: 544
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Spit, Sputter, Cough,Blemph
Original Message Feb 5, 2005 8:17 am |
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These are the sounds issued forth from my beloved Tecumseh engines equipped with fixed Jets. I don't own one but my friend does on a machine I recomended and he constantly rags me about it. In an effort to get him off my back I have researched the following and these are the results: 1) The replacement carb for a medium frame Tecumseh is 632334A ( this is a part # that replaces a disontinued part but the blow up diagram of the replacement shows an adjustable main jet. Therefore I ASSUME it is adjustable. 2) The carburetor repair kit for this model is 632347 I was able to secure a blowup diagram of this carb and the list of parts in the repair kit. It APPEARS all of the main jet parts are present in the kit.I NEED VERIFICATION If this includes the needle and the jet. If one were to remove the fixed jet from the current carb which I believe is the green plastic tube held in by O-rings and replace it with the adjustable jet and needle from the #632347 repair kit would it work? Could you retrofit the new bowl with the adjustable assembly or would you have to buy a new bowl? If anybody could verify or correct my assumptions I would be most appreciative. Marc Just for the record -theHonda GX series engine on my power washer made the same spit, sputter,cough,blemph sounds due to it's fixed jet carb. Honda has addressed this problem by producing a line of altitude related jets. Another words if you want to richen up a Honda fixed jet carb parts are available. The carb will still be fixed jet but at a richer setting.
This message was modified Feb 5, 2005 by mml4
SnapperV210P,Toro22177,TroyBilt42010Snowthrower,Craftsman Shredder,American Turbo Pressure Washer HondaGX200,Stihl011Saw,EchoPas260Trimmer Edger,EchoPB602Blower,EchoHCR150Hedge Clipper
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Richie
Bring On The White Stuff
Location: Long Island, New York
Joined: Dec 12, 2003
Points: 562
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Re: Spit, Sputter, Cough,Blemph
Reply #50 Feb 14, 2005 1:19 pm |
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  Richie, How much of a HP increase did you think you got with your new carb on your 8HP engine?? Also, what is the part number on the carb, or is it top seceret?? Fred  Hi there Fred, I'd love to answer your question but I can't since I don't have access to a Dyno. I'd love to find one and run the engine with the original carb and then the adjustable version that is on it now. Any comment on my part would be completely subjective based on my opinion, which means nothing. I've been trying to keep these posts as objective and scientific as possible. As stated on one of the other treads, I will say the engine runs so much better not being starved of fuel and I have not been able to get the engine to surge at all. Furthermore, if you take that disclaimer that LawnBoy posts, it would seem that emission carbs may affect power in some way. The difference is a leaned out carburetor as opposed to one that can be metered correctly and allow the engine to run well. I also don't want to confuse the horse power / torque issue, which is something else. As for the carburetor, the actual part number is, TEC-632334A, and the rebuild kit for it which includes the adjustable main nozzle (bowl nut) is, 632347, and costs about $12.27 plus s/h. Hope this helps and sorry if I had to be somewhat vague.
Richie
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jubol
Location: Dover, De
Joined: Oct 3, 2003
Points: 1558
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Re: Spit, Sputter, Cough,Blemph
Reply #52 Feb 14, 2005 1:32 pm |
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Richie, Thanks for the numbers. Also when you were at the Tulsa engine site, did you check the specs on the Tec HMSK 8, graph shows about 6.4 HP out of 8. The 10 shows 8HP, which is about a 20% loss due to the EPA carb. I think that your good carb got you back at least 1 HP, maybe more, so now your 8 is at least about 7.4HP. Fred
Husqvarna STE927(11.5HP) snowblower, MTD Pro Series 18/42 Lawnmower, MTD 6.5 HP Self Prop Lawn Mower, Weedeater 1500 Blower, Web Gensis 2000
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Richie
Bring On The White Stuff
Location: Long Island, New York
Joined: Dec 12, 2003
Points: 562
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Re: Spit, Sputter, Cough,Blemph
Reply #53 Feb 14, 2005 2:17 pm |
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Richie, Thanks for the numbers. Also when you were at the Tulsa engine site, did you check the specs on the Tec HMSK 8, graph shows about 6.4 HP out of 8. The 10 shows 8HP, which is about a 20% loss due to the EPA carb. I think that your good carb got you back at least 1 HP, maybe more, so now your 8 is at least about 7.4HP. Fred
Fred,
I'd have to verify the graph you are referring to, but I believe that is the one I have. As for additional HP due to my adjustable carb, it stands to reason something good came out of it, beyond the fact it runs better, but what makes me hesitant about me commenting further is the fact these engines run at a governed speed. For whatever it's worth, if I had to do it all over again, I'd still make the carb switch Marshall, if you were referring to me in the way I answered Fred's previous question about HP verses the new carburetor, thanks.
Richie
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Ben07
The more you know about something, the more you find there is to know.
Location: Pittsburgh, PA
Joined: Feb 26, 2004
Points: 178
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Re: Spit, Sputter, Cough,Blemph
Reply #55 Feb 14, 2005 2:54 pm |
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What is also fish about that tulsa site they will only give you one full graph of the hp to torque chart per category of same cube engines I.E. are both 19.43 cubes. so no graph on the nine. Strange also important to notice two reference points on the graph, operating rpm on my 8 hp is 3600, under load it can drop to 2800. at 3600 it developes 11.5 ft pounds of torque and at the lower rpm it increases to 12.9 foot pounds. however it looses the meaningless HP number as it decreases by like 1.25 hp .. Torque is much more important ref here and it is what is keeping the engine runnin under load Would be willing to bet the nine developse it's hp at a higher rpm above 3600 and it could be very well the same engine that has the same torque at the 3600 and the 2800 rpm's . bore an stroke are the same cept seems they decided to write one of them in decimal and the other in SAE. same weight to the motor etc, everything they do always looks like a shell game. If it looks like a duck an walks like a duck, maybe it is a duck Ben07
This message was modified Feb 14, 2005 by Ben07
Ariens 8524LE, Toro CCR2000, Jacobsen S-B S-blowers, Generac 10hp Gen-convt. to N.G., 5 L-boys(D's F's &Dura( 74,77,80,88,00), Antiq. 1960 AYP 20 in. mag w 3.5 Tech mower. Ryan/Ryobi gas Trim. AYP 205 gas blwr. Mac c-saw,Toro E-blwr, 2 Weed-E e. stg. trims. outboards, boats, util trail, 2 Jeeps
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Ben07
The more you know about something, the more you find there is to know.
Location: Pittsburgh, PA
Joined: Feb 26, 2004
Points: 178
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Re: Spit, Sputter, Cough,Blemph
Reply #57 Feb 14, 2005 4:31 pm |
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Can't give it you exact Marshall, cause it is kind of mixed up in a hodge poge, as they do not have all the engines for sale, so you can't actually compare an hmsk 8 to an hmsk 9, you can get a generathought though, but different engines have diff bolt-ons, like air cleaner no aircleaner, some fixed linkage with a governor and others no fixed linkage, say for like a go cart etc. But in general seems to go from like 400 to 460 in the average diff between 8 and 9 would more research to get better info, will prob be unavail to do that at this time just tryin to give you a general feel etc. (also remember you go from an 8 to a nine on a SB an there could be hundreds of dollars diff, but some of that is extras, like drift cutters, heated grips , lil wider auger box.. I am not talking things like differentials 1120 1457 Like on the ariens deluxe line the 8.5 is 1.120 dollars and the 11 is 1457 (no differential on either Ben07
This message was modified Feb 14, 2005 by Ben07
Ariens 8524LE, Toro CCR2000, Jacobsen S-B S-blowers, Generac 10hp Gen-convt. to N.G., 5 L-boys(D's F's &Dura( 74,77,80,88,00), Antiq. 1960 AYP 20 in. mag w 3.5 Tech mower. Ryan/Ryobi gas Trim. AYP 205 gas blwr. Mac c-saw,Toro E-blwr, 2 Weed-E e. stg. trims. outboards, boats, util trail, 2 Jeeps
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robmints
Joined: May 13, 2003
Points: 4691
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Re: Spit, Sputter, Cough,Blemph
Reply #59 Feb 14, 2005 7:05 pm |
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Hi MM14.. Analagy like driving on a 65 mph highway in 4th gear, standard trans. you come to a hill, steep going up the hill you got to floor the accelerator to try and maintain the speed. you do that however speed drops to 40 , now even if you are able to maintain 40 you are going to heat the motor up real fast. You have an alternative, you can downshift , using the gearing advantage bring the car back up to 65, only difference is the motor is now running at a higher rpm , closer to peak etc. However with the governor setting you don't have the same choice, cause it only opens the accelerator to maintain an rpm. In the same analagy as above now with a governor in the motor, The same thing would have happened at first the car would have dropped speed to 40 mph. so you do a quick down shift. you will never get the car back up to 65 mph, cause it takes more RPM's than the goverened RPM. (so you will have this big powerfull engine crawling up a hill like it's a wimp, ) So after all that has been discussed on this subject How bout we get a feel for other's opinions Make a quick post , in agreement or not. It would be interesting Ben07 Down shifting has less to do with horsepower and more to do with a multiplication of torque. Not anything like a govenor.
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