I got spoiled using this type of light from working on older ignition systems when it was hard enough to read the TDC mark let alone the DEG marks on the harmonic balancer. With this type of Timing light you ignore all other marks and just use TDC mark or the OT mark on the airhead. You know what is odd is that My old MT241 snap on advance light read correctly on this bike. If i can find one on E Bay cheap enough I may grab it I read your other post about this timing light and you said the spark splitter isn't worth the trouble.īut does it work to make the light read correctly when you do use it in this application (meaning not having to double the settings) You are correct set it to 12 to check For 6 deg (S) low Idle and 64 to check for 32 deg max adv (F) 3500 RPM because of the wasted spark Like you said when I started advancing the setting on the timing light it steadied right up. You are not doing this.I guess when it was not showing a steady reading set to zero I assumed it wouldn't work at all. It can be handy and quick to dial in the advance per the underhood spec on your light and go. if you are doing a dozen tuneups a day on a variety of vehicles. The tuning you are doing is very simple, but the wrong tools can make it very complicated. See Auction Information for full details. If you can find one under a $100 they do lot but you really want all the leads and pickups and the manual. View Item in Catalog Lot 101 (Sale Order: 103 of 471) Sold for: 90.00 to onsite 'Tax, Shipping & Handling and Internet Premium not included. Garage sales for $3 maybe? I have a Fluke 88 with a tach function. if you lack one on the dash a cheap tach/dwell meter works. You need the tach to check your max advance RPM and your idle RPM. You have a tach on the dash, no? It works. I just found a like new snap on Mt 1261 timing light for 20.00 it lights up and flashes, the readout says snap on over and over and over, I hit rpm and it. Don't need anything else-including a manual for it. I've been using a Sunpro/actron CP7504 forever. Rather than dicking with it, ditch it on craigslist (like everybody else) and just get an ordinary, good, timing light. All the computerized stuff gets you nothing but a more difficult tool to use and one with a lot more things to go wrong. I avoid their stuff for a number of reasons-only buy it when I have to.Īside from a possible stiffy from having something labeled "snap-on" (but they didn't make it), i would say the thing is a bad idea. They lack some things when it comes to a being a good company to buy from. Snap-on Mt1261a Computerized Tach Advance Timing Light Instruction Manual Only 17.95 View Details Snap On Tools Collectable 24k Gold Plated Timing Light Award Rare Vntg 80s 750.00 View Details Snap-on Mt1261a Computerized Tach Advance Timing Light Instruction Manual 1990 24. Snap on isn't providing a manual for download. The replacement part for what looked like the more likely problem point (the leads) is $155. a whole lot of people looking for manuals and a number of people having problems. Includes Chisels, Heathkit Timing Light, Riverside Dwell Meter & Tachometer, Battery Charger, & Misc. Figure since the S marks 6 degrees prior to TDC (or after, I forget) then maybe the advance on the light needs to be set there? Does this sound right? Can this type of timing light be used on an airhead?Ĭlick to expand.I looked around a bit for manuals for that. If I change the advance the S moves up and down. Problem is, without really knowing how this particular timing light works, I am not sure if the readings I get are good or even interpretable. If I set advance to 6, the S lines up in the center of the hole and at ~3000 RPM the Z lines up in the center of the hole. With the light set at 0 advance, the timing marks are unreadable. one i was looking at,if its the right kind is a 'Snap On MT1261A Tach /Advance/ Timing Light 'currently on ebay for about 80 bucks. I have a snap-on computerized timing light (MT 1261A) with tach/advance functions (I don't have the timing light manual, so I basically have no idea what I'm doing - I can at least get it hooked up and the light comes on).Īt idle (~1050 RPM) the light reads about 2100 RPM (twice what it should be). Right now, I am checking the dynamic timing. I am taking care of a few maintenance items as I gradually get familiar with the machine.
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