QuestionQUESTION: This may not be a lawnmower, but you started repairing
engine around the time this engine was being made so you
may be able to help.
The engine is in a Alouette snowmobile. it is a 2
cylinder, single carb fan cooled 2 stroke. It ran
perfectly 2 weeks ago, then one piston stopped firing one
day and I drove it for 30 minutes not knowing what was
wrong. The next day both fired and it drove for 15miles
fine, I shut it off to ice fish, then it started but on one
piston again.
the lights always flickered off and on, something staying
off and sometimes one but very dim, then string for a
while. this may be symptomatic?
so I replaced the external ignition coils, wires and
plugs. no better.
I replaced the condensers and points. no better. in fact
the other plug no went dead.
I tested it with my voltmeter and the coil that did have
some life in it tested 2.5 volts and the sparks was dull
red and did not ignite the gas when turned over. The other
coil was getting only 0.2 volts.
I polished the outer face of the internal generating
coils and the face of the magnets on the flywheel but
nothing. if anything it seems to be getting weaker each
time i pull it.
i'm at my wits end here... the ohm tests showed all wires
to be good, no open lines. my coils resisted 3.1 which I
have heard is good. could they still be bad?
please help!
ANSWER: Hello Tom:
>>I am Familiar with these Engines. They were Used on Mopeds a Lot when I First Started Repairing them.
>>The 1974 Arctic Cat Lynx Used a Sachs Engine Also.
>>**If you have an Ohmmeter, you should have around 4 or 5 OHMs. If at or near Zero, the Coil has Shorted.** The Higher the Resistance to 5 OHMs, the Better the Condition of the Coils. Usually when the OHMs are Less than 4 you Start having Ign Problems like you Described.
>>From your Description it Sounds like the Ign Coils are Going Bad and Require Replacing. It is Not Unusual for Coils to Open Up and Stop Firing the Plug/s when they Get Hot from Use or the Engine Temperature Causes them to Heat Up to a Point that they Stop Firing the Plug/s if there is a Problem with the Coils Windings. Once the Coil has Cooled, it Usually Starts Firing the Plug/s Again until the Coil/s Heat Up and they Short Out Again.
>>Please, Do Not Hesitate, If you Hit a Snag, if I Missed Something or this Does Not Correct the Problem, I am Here if You Require More Assistance. Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Thanks.
Good Luck
Respectfully
John
>>PS: I am Allowed to Answer 10 Questions a Day. If you See I am Maxxed Out, then Try Submitting your Question at or Just After 8pm EST (US). My New Day Starts then. Comments and Ratings are Greatly Appreciated. Thanks.
Respectfully
John
---------- FOLLOW-UP ----------
QUESTION: Hi John, just trying to track down this part. the people
at Dennis Kirk say the 74 arctic cat lynx had a wankel
engine, so is this not the one? nobody has parts listed by
engine type and nobody knows anything about Alouettes. can
you set me straight?
AnswerHello Again Tom:
>>I am Sorry.
>>I Failed to Include this Site Addy; http://www.themopedjunkyard.com/newsachs.html in my Last E-mail to you. This Site should be Able to Assist you in Locating Parts and Other Information about the Sachs Engines.
>>Please, Do Not Hesitate, If you Hit a Snag, if I Missed Something or this Does Not Correct the Problem, I am Here if You Require More Assistance. Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Thanks.
Good Luck
Respectfully
John
>>PS: I am Allowed to Answer 10 Questions a Day. If you See I am Maxxed Out, then Try Submitting your Question at or Just After 8pm EST (US). My New Day Starts then. Comments and Ratings are Greatly Appreciated. Thanks.
Respectfully
John
