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Post by ruppluver on Feb 12, 2013 19:46:07 GMT -6
Ok, I had some problems with my TR340-3,it lost power & killed in driveway. Wouldn't start back up. There was lots of noise coming from the Mag side. The engine is out of sled & on the bench. I checked the hi/low adjustments,low side of carb,was 1 1/2 turns out. The high side was only 3/4 turn out. Could the high side have been too lean at 3/4 turn out??? The plugs looked black/wetish. Ok, the engine I put back in the 70WT,was a TR440-3 engine,40hp. I checked the plugs,#1 was brownish/tan,#2 was black/wetish looking,both low/high speed adjustment screws are 1 1/4 turn out. What should they be??? Also what plugs should I be running in the 440? Should I run a surface gap plug? Anyone help me out  Thanks. |
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Post by urinsnowdust on Feb 12, 2013 21:55:33 GMT -6
you can't read a surface gap plug,try a EV equivlant,small wire.They can be read right away.Look at the center eletrode,with a magnifing glass,if the plating is cleaned off only on the very end,its fat,if its a 1/4 of the exposed lenght to the porcelin its right on.1/3 of the length its lean.run at clutch RPM,mark plugs p&m 1/4-1/2 mi.hold throttle at that position & hit kill switch,pull plugs & read,repeat in 1000 rpm increaments till wot.before doing any of the above,pressure check the assembled engine to appox.10psi,pluging the ex, & intake & putting regulated air thru the pulse fitting in the cases or in a fitting in the port covers.i have found engines to only leak under a vacuum test,try it both ways.fuel to air ratio should be1 fuel to 14 air,steel will burn in a oxy .atmospher
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Post by ruppluver on Feb 12, 2013 22:21:36 GMT -6
None of my 70-71 sleds have kill switches.
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Post by magnumal on Feb 13, 2013 8:57:10 GMT -6
turn the key off !!!!
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Post by ruppluver on Feb 13, 2013 9:01:14 GMT -6
Thats what I do.
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Post by magnumal on Feb 13, 2013 9:03:17 GMT -6
run the short reach plugs just make sure they dont burn white and not black anything in between ok black is better then white . You know this stuff your just kidding us right ?
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Post by magnumal on Feb 13, 2013 9:04:44 GMT -6
I dont think 3/4 turn should kill a motor unless it was -35 degrees out !
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Post by magnumal on Feb 13, 2013 9:07:30 GMT -6
These are old fan motors correct ?
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Post by urinsnowdust on Feb 13, 2013 9:44:18 GMT -6
3/4 or 1 turn out dosn't guarantee correct fuel delevery,especially if the engine is not sealed or fuel delevery to the carb is limeted.
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Post by ruppluver on Feb 13, 2013 16:58:42 GMT -6
Yes,fan cooled engines. I pulled the mag side apart,nothing wrong there. BUT the PTO side,oil/gas everywhere. It was on the engine mount,tunnel,chaincase;the area below seal was quite wet.I'm thinking seal was BAD,it burnt down the piston,impregnated head with all kinds of debris & scored the jug. Anyway,I have a parts engine now. All the useable ignition parts will find it's way to another 295 or 340. Just out of curiousity,I started the TR440 & sprayed starting fluid around the clutch & intake,nothing. Ran good. Also put in a set of MATCHED spark plugs,will test tomorrow.
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