1986 Enticer - Running Rough - Help Please - Snowmobile World : Your #1 Snowmobile Forum
LinkBack Thread Tools
post #1 of 1 (permalink) Old 01-03-2016, 04:01 PM Thread Starter
Junior Member
Join Date: Feb 2015
Posts: 7
1986 Enticer - Running Rough - Help Please

I bought this old 340 for my son and he's just begun his 3rd season with it. I took a buddy's advice when looking for an old sled to find a nice clean Yamaha 340. It's been great and has provided hours of enjoyment. Up until now the only issue we ever had with it was the coil wire detaching from the coil body. I was able to carve back the plastic/rubber far enough to solder it back on, taped it up for safety, and never looked back.

This season it fired right up and was working great until just recently. It still starts up fine and after it's warmed up for a minute or so, we can do a few rips with it but then it loses power, sputters, coughs, pops, misses, and just won't rev up any more. You have to kinda feather it back to the garage.

- I've swapped plugs, no change
- I've swapped coils, no change
- I've cleaned the carb (it was fine), no change
- compression when warm 100/105 psi
- sprayed brake cleaner on PTO side of crank and intake gaskets, no change

I've attached a picture of the plugs and they are light brownish, but maybe just a touch lean? Also the oil pump setting is threaded outwards from the carb bracket to the max (for max oiling). And, we also put a blurp of oil into the gas tank for safety.

I have another '81 Enticer here and thought I could swap CDI's, but the wiring connections are not compatible.

Am I missing anything else????
Attached Thumbnails
Click image for larger version

Name:	IMG_3450.jpg
Views:	108
Size:	50.5 KB
ID:	32057   Click image for larger version

Name:	IMG_3449.jpg
Views:	110
Size:	31.3 KB
ID:	32065  
happyhab is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Snowmobile World : Your #1 Snowmobile Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome