RE: New SV Gassers  
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XYZ-26cc Gas Engine by SERCE, LLC.
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RE: New SV Gassers - 1/16/2008 5:19:33 PM   
freeonthree



Posts: 2562
Joined: 8/1/2004
From: Red Bluff, CA, USA
Status: offline 		First I verified that one of the reference lines on the hub was in fact TDC when lined up with the notch in the case, then I set my degree wheel so that TDC was at 12 o clock.

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I dont crash, I just land hard

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RE: New SV Gassers - 1/16/2008 5:21:12 PM   
freeonthree



Posts: 2562
Joined: 8/1/2004
From: Red Bluff, CA, USA
Status: offline 		Misses or 4 cycles ?

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I dont crash, I just land hard

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       Post #: 227

RE: New SV Gassers - 1/16/2008 5:33:24 PM   
bako


 

Posts: 105
Joined: 5/8/2004
From: tbilisi, GEORGIA
Status: offline 		misses at wot. adn i noticed, that when I retarded ignition, it needs leaner high speed needle settings to prevent missses. what about youres, what are your needle settings? my are 1.1/2

for sure it's 4 cyclening when ideling

(in reply to freeonthree)
       Post #: 228

RE: New SV Gassers - 1/16/2008 5:44:35 PM   
freeonthree



Posts: 2562
Joined: 8/1/2004
From: Red Bluff, CA, USA
Status: offline 		Yep, mine would randomly miss (da da dada da da dada da da dada), but the full throttle miss went away after I retarded the timing the first time. I was never able to get the miss out of the midrange, but there would always be a sweet spot at about 1/2 throttle where it would be mint. Either it needed to be more retard, or the ign box is having an issue, but then how would we explain the sweet spot, and it would not miss as long as I held that throttle setting. It's real windy here now, so I havn't fired it up yet since the repairs and 18x6.

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I dont crash, I just land hard

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       Post #: 229

RE: New SV Gassers - 1/16/2008 5:57:25 PM   
freeonthree



Posts: 2562
Joined: 8/1/2004
From: Red Bluff, CA, USA
Status: offline 		I dont remember, but I think when we pulled the timing back the first time, we just flew it again and it was much better.

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I dont crash, I just land hard

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       Post #: 230

RE: New SV Gassers - 1/16/2008 7:35:49 PM   
ca$hey



Posts: 354
Joined: 11/30/2005
From: drouin, , AUSTRALIA
Status: offline
quote:

ORIGINAL: freeonthree

Im not believing that at all. I bet the piston to cylinder fit is just as accurate. Walbro carbs are fine, and bearings are bearings. I suppose it's possible that the cranks may be balanced better in the more expensive engines, but who knows. What else is there besides more detailed outside finishing, good for nothing really, and more expensive advertising which drives up the costs as well. The electronics may be better, but I hear that one of the big brand name cdi boxes had an overheating problem at one time, and mine has never even gotten warm when I checked it, so the real test will be how long it lasts. Weedeater specs ? Our last el cheapo $99.00 weedeater lasted about 10 years, and still ran when I snaged the choke for my plane the other day, so the clearances couldn't have been too sloppy. My SV 26 doesnt sound that much different than my bud's Brison 50 when it's running smooth, just smaller, and I have a feeling today, at least I hope, it will be running top notch. I seriously doubt that the engine itself has any issues. Looks like fine quality to me for a little gas engine.

Have you compared your 3w or your DA to the sv or any other cheper line motors?

(in reply to freeonthree)
       Post #: 231

RE: New SV Gassers - 1/16/2008 10:26:03 PM   
freeonthree



Posts: 2562
Joined: 8/1/2004
From: Red Bluff, CA, USA
Status: offline 		Im a Saito guy origionally, this is my first gas engine, but I have been a mechanic my entire life, and I feel this engine is sweet. Greg and I just tested my engine with the new fuel lines, and ignition timing and 18x6 prop. It vibrated badly so we put the 16x8 and spinner back on. Flipped her once more and she started instantly. After a breif warmup, it transitioned beautifully, but had to fatten the top about 1/2 turn or so. Not one gurgle came out of this engine since, and it's spinning that 16x8 at 8200 rpm. The origional Jenn Feng spark plug is back in it now because the Autolite crossover from the NGK BPMR-6-F glitched the plane badly. Thats not to say he crossed the plug number correctly, I doubt it mostly. Overall, right now, my SV 26 is running like a swiss watch, and does not misfire at all anymore. Oh, we can't forget that I also switched to QuickSilver Full Synthetic @ 100:1. Gregs Brison 50 had been running on it for years. With the Pennsoil Outdoor 2 Stroke @ 32:1, I had black sludge all over the belly, and when I put my hand behind the exhaust, it would get real oiley, but now, the only thing that came out onto my hand was a few tiny carbon specs, and that quit shortly. There is zero moisture or smoke that I can feel or see coming out of my exhaust now, and I love it ! Yipeeeeeeeeeeeeeee ! This SV 26 runs every bit as nice and smooth now as Gregs Brison 50, it just makes a little less noise.

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I dont crash, I just land hard

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       Post #: 232

RE: New SV Gassers - 1/17/2008 12:54:22 AM   
freeonthree



Posts: 2562
Joined: 8/1/2004
From: Red Bluff, CA, USA
Status: offline 		Greg and I just got the deal of the century ! He called me up and said he just bought a gallon of the QuickSilver Full Synthetic for $15.00 at Walmart. I paid $12.74 for a quart of it last night ! at walmart ! Needless to say, I got there fast and got me a gallon for $16.09 out the door ! At 100:1, thats 84 gallons of fuel mix at 19 cents a gallon for the oil ! I think we died and went to heaven...

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I dont crash, I just land hard

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       Post #: 233

RE: New SV Gassers - 1/17/2008 1:57:16 AM   
ca$hey



Posts: 354
Joined: 11/30/2005
From: drouin, , AUSTRALIA
Status: offline 		Well I havent changed the plug,,,or the carb,,or anything eles except the timeing,,spinning 18x8 @ around 7200rpm ,,no miss or splutter good spool up real good on a 10lb 3D plane

(in reply to freeonthree)
       Post #: 234

RE: New SV Gassers - 1/17/2008 8:22:16 AM   
freeonthree



Posts: 2562
Joined: 8/1/2004
From: Red Bluff, CA, USA
Status: offline 		Then I better try to figure out why my 18x6 made it vibrate so I can try it. That sounds very hopeful. I figured it would pull it ok. I hope it a good fly day tomorrow. My 26 is running perfect now.


< Message edited by freeonthree -- 1/17/2008 8:35:11 AM >

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I dont crash, I just land hard

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       Post #: 235

RE: New SV Gassers - 1/17/2008 11:29:28 AM   
jstanton



Posts: 1895
Joined: 8/30/2002
From: Millington, TN, USA
Status: offline 		I have an APC 18x6w on mine and the SV-26 spins it at 7400RPM. I would check your prop and make sure it is balanced correctly. A prop that is not balanced with vibrate badly. I am almost finished with my Stinson and I can wait to going flying. The plane weigh's 12.5 lbs. I is very cold here now and I don't like flying in cold weather so it my be a while before she goes up. I'll post a pic when I have finished the build.

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Jim Stanton
Millington, TN 38053

(in reply to freeonthree)
       Post #: 236

RE: New SV Gassers - 1/17/2008 8:33:31 PM   
freeonthree



Posts: 2562
Joined: 8/1/2004
From: Red Bluff, CA, USA
Status: offline 		I feel your pain. Were in or windy season here, but I'll keep my fingers crossed. It figures, as soon as the plane is running awesome, the darn wind makes an appearance.

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I dont crash, I just land hard

(in reply to jstanton)
       Post #: 237

RE: New SV Gassers - 1/17/2008 9:08:24 PM   
Ed Cregger



Posts: 7736
Joined: 1/31/2002
From: Ringgold, GA, USA
Status: online 		I just backordered an SV50. The 26 looks so good, I decided to give their 50 a try.

It was all I could do not to order the SV50 TWIN and 100 TWIN as well.


Ed Cregger


Dagnabbit! Forgot to say TWIN the first time. Gettin' old stinks, but it's not as stinky as the alternative. <G>

< Message edited by Ed Cregger -- 1/18/2008 5:57:26 AM >


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Artisan

"Flying models since the Fifties - I'll get the hang of this yet!!!"

(in reply to jstanton)
       Post #: 238

RE: New SV Gassers - 1/17/2008 11:27:53 PM   
freeonthree



Posts: 2562
Joined: 8/1/2004
From: Red Bluff, CA, USA
Status: offline 		Oh boy ! You lucky dog ! I don't see me stopping here either really. hehe
I decided to stick with the 16x8, and thats because I found these Zenoah 26 specs on prop size (Benchmark Prop: APC 16x8 @ 8,700 - 8.900 rpm). Good enough for me, for now anyway, im doin 8200. Close enough... The Zenoah has a velocity stack and probably a slightly larger carb, so im not offended.

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I dont crash, I just land hard

(in reply to Ed Cregger)
       Post #: 239

RE: New SV Gassers - 1/18/2008 5:23:58 AM   
freeonthree