Engine Identification [Archive] - Snowmobile World : Your #1 Snowmobile Forum

: Engine Identification


SHalloway
01-23-2009, 12:32 PM
I have two scrapped Polaris snowmobiles that I am looking to combine into one usable machine. One is an Indy Trail Deluxe, engine serial number (from the flywheel housing) 9205233, which I think is a 1993. The other number on the flywheel housing is EC443PM00122073.

The other one is an Indy Trail Supertrak, engine serial number 9000988 from a sticker on the flywheel housing, but no other apparent number on the housing. I was told this was a 1991 snowmobile.

I am trying to determine what engines are in these 2 machines based on the numbers I listed above. Can anyone help me interpret them?

retiredpop
01-24-2009, 02:16 PM
The ECM44.. designates a 440 fan cooled sled.

162Whiskey
01-24-2009, 10:33 PM
Pop is correct. The EC44 is a 440 fan; the 488 fan is marked EC50. You will also find additional marks, at least on the cylinder castings, like 2PM or 3PM which indicate the series of the motor; the lower number being earlier. Many of these old engines will interchange cranks and crankcases with only the cylinder making the difference in size of the engine. (Of course they need to be carbed properly.)

I would not necessarily trust the fan shroud or flywheel - or even crankcase- to determine what the engine size is. You'll need to look at the cylinder castings.

A trail with a 440 would have been an earlier model as they went with the 488 for many years - until switching yet again to the 550.

The only thing I'd be much concerned about is using matching case halves to start. I've put a number of these older fan engines together without worrying about the crankcase component origins. Use the parts you have which are in the best condition and make sure electrical, fuel, and clutch are right and you should be good.

People here will help you with specific specs if you needs them.

Beaumod
01-29-2009, 08:29 AM
Pop and Whiskey,

Was hoping you could help me as well. I'm helping my Dad fix what we think is a 1988 Polaris Indy 400. However it's a bit of a frankinmobile and were not sure. It needs a new Ignition Coil but I'm not positive what engine I have. The engine code is EC40PL-02. Do you folks know of a website that I could look up the engine so I know what parts to purchase for it? Thanks in advance!

Derek from Detroit

retiredpop
01-29-2009, 09:35 AM
You have a 398 cc liquid cooled engine used in the Indy 400. You don't have enough information for the year although for most engine parts that is not really that important. Do you have a serial number on that engine? The parts fiche I use for older sleds is

http://www.ronnies.com/micro.htm

162Whiskey
01-29-2009, 10:01 AM
A couple of the nice things about some of those older engines is that they used some of the same parts on various machines. If it is the exciter coil you need, it is likely the same as the one also used on the 500 liquids and perhaps some of the others. Further, the part (which is available) is very inexpensive as electrical parts go - about $60.

I suspect some of the old CDIs may cross-over. Unfortunately, many of the CDIs which are getting close to 20 years old and older are no longer listed as available. Consequently, some of the typical Polaris fiches don't show the part number.

Beaumod
01-29-2009, 11:49 AM
Thanks Pops and Whiskey,

I'll see if we can find the serial number, I'm guessing you know exactly where to look for it...? Thanks again for all your help. I'll post a note when complete.

Regards,

Derek from Detroit

retiredpop
01-29-2009, 11:52 AM
The CDI is listed under Magneto 400 as part no. 3083989. Interestingly though it is only shown under the 1990 and 1991 model years. I am sure it is the same one as for your sled though. It is about $315.

Beaumod
01-29-2009, 11:58 AM
woah... 18 CDI UNIT
3083989 1 $314.99

More than I expected. Thanks a bunch.

retiredpop
01-29-2009, 12:56 PM
woah... 18 CDI UNIT
3083989 1 $314.99

More than I expected. Thanks a bunch.

Yeah, I know! Do you have any used sled parts businesses around you? I know some of the 500 liquid cooled engines used the same CDI also.