Thread: Are my carb numbers right?
09-12-2011, 06:54 PM #1
- Join Date
- Sep 2011
Are my carb numbers right?
I am in the process of going thru my '93 650. Everything is stock and it has triple 38mm Mikuni's. I have them cleaned and all apart right now. On many of the threads, I see carb jet numbers like 180, 177.5 etc. With my magnifying glass, my 64 year old eyes read:
main fuel needle valve inlet of 1.5
Main jet 77.5
Pilot jet 77.5
Are these numbers right? If so...what are the numbers i read on all the posts? I plan on keeping everything stock except for adding a three outlet fuel pump and possible new F/A's (because I cant reach any adjusting screws with the stock one on!)
09-12-2011, 08:19 PM #2
Be sure to count number of turn(s) it take to close each adjuster, in 1/8 turn increment, before removing them for cleaning. If you missed that part, then here're the stock settings:
Hi = 7/8 Mag | 3/8 Cen | 5/8 PTO
Low = 1/4 (all)
Pop off = 10-18 PSI
Other numbers you see are for different ski models, they don't apply to yours.
09-12-2011, 10:11 PM #3
- Join Date
- Oct 2006
- Cleveland OH
You're the second guy this week to mention 1.5 needles and seats. i thought ALL mikuni carbs came with 2.0 NS combos. I have to look into that one....
Yes, the jets are 77.5 for both.
09-13-2011, 09:33 AM #4
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By Tatorsalad in forum Yamaha Old School SkisReplies: 5Last Post: 08-18-2011, 10:14 AM
By jetskibum1 in forum Yamaha Old School SkisReplies: 2Last Post: 09-25-2010, 05:20 PM
By fire in forum 2-Stroke PerformanceReplies: 7Last Post: 10-31-2009, 02:22 PM
By Rudedog in forum Sea Doo ClassifiedsReplies: 0Last Post: 06-28-2009, 03:20 PM
By dan725 in forum Sea Doo 2 Stroke SkisReplies: 13Last Post: 05-25-2009, 10:29 PM