RICH vs LEAN SYMPTOMS - Snowmobile Forum: Your #1 Snowmobile Forum

SLEAD_RX · 09-06-2006, 01:04 PM

(SYMPTOMS: ENGINE TOO RICH.)

a. PERFORMANCE IS FLAT, NOT CRISP.

b. CONDITION IS WORSE WHEN ENGINE IS HOT.

c. CONDITION IS WORSE WHEN THE CHOKE/
STARTER IS USED.

d. DARK,FOULED SPARK PLUG.

e. REMOVAL OF AIR CLEANER HELPS.

f. EXHAUST POPPING OR BACKFIRE.

g. ENGINE SOUND IS DULL.

( SYMPTOMS: ENGINE IS TOO LEAN.)

a. ACCELERATION POOR, SURGING.

b. PERFORMANCE IMPROVES SLIGHTLY AS
ENGINE WARMS.

c. BETTER PERFORMANCE WHEN CHOKE/
STARTER IS USED.

d. NO COLOR, OVERHEATED SPARK PLUG
ELECTRODE.

f. POPPING BACK THOUGH CARBURATOR.

g. ENGINE PINS OR KNOCKS, EXCESSIVE
ENGINE HEAT.

**smallengineguy** · 09-06-2006, 05:16 PM

Don't forget Piston turns into a pile of goo...

**RJ Gleason** · 09-07-2006, 10:42 AM

SEG, make this a sticky at the top of the engine section?

**smallengineguy** · 09-07-2006, 08:06 PM

Done!!!!

Tracker · 10-12-2006, 02:49 PM

Hi, I'm new to the club, and I need some help.I just bought a 1985 Polaris Indy Tail (440). When I got it home, it started first pull. I put in the garage, and now it is very hard to start. I think the previous owner fogged it for storage, so that will explain the excess smoke. I put new plugs, and new gas and it is still very tough to start. I finally got it running, and it is very slow on go. Once it gets moving, it seems to run fine, but from a stop it is tough to get moving. It seems like the carbs need to be set. Can someone tell me how to set them? Thanx in advance.

**RJ Gleason** · 10-12-2006, 02:52 PM

How do the plugs look?
]Is one dark and wet looking and the other dry and tan?

Tracker · 10-12-2006, 02:53 PM

Both plugs are clean, but wet.

**RJ Gleason** · 10-12-2006, 02:54 PM

fouled plugs.
put new ones in.

Tracker · 10-12-2006, 02:55 PM

These are brand new, just put them in this morning.

Tracker · 10-12-2006, 02:57 PM

I'll give that a try. Thanx for the input.

**RJ Gleason** · 10-12-2006, 03:01 PM

Once the get wet, they do not work well.
Obviusly you have another problem.
Check that you have a strong spark and that the plugs are gapped correctly.
You should use a spark detector to check for weak or no spark.

Did the previous owner use anything in the gas (stabil)?
If not, drain the tank and fill with fresh, remove and clean the carbs (although it seems to be getting enough fuel).
Refer to the how to's in the tech section of thei site.

Tracker · 10-12-2006, 03:22 PM

Thanx again,I'll check out the tech section. I'll let you know how it goes.

SSnthe10s · 10-12-2006, 03:57 PM

does anyones sled ever give a loud back fire when you shut it off. mine also does it somtimes when i give it a pull to start it back up after it is running. it kinda annoys me. Im thinkin my sled it jetted a lil to fat.