09-29-2012, 01:17 PM #1
1200r cut off while riding. Starts fine/compression good
was out riding yesterday, boat was running fine. I was cruising about 40 mph and it just shut off. I let it slow down and fall off its plane, and it restarted fine. I got it back up on a plane and was trying to get back to the dock and less than a minute later it did it again. Same thing, I let it fall off its plane, and restarted it and rode it 10 minutes back to the dock and i stopped/started it again, it seems to be working fine. I got it home, compression is 118 across the board. Cyl 1 and 2 plugs look fine but number 3 looks like this.
Any ideas? I've heard it can be a motor starting to seize up, im trying to find a bore scope to use
09-30-2012, 05:57 AM #2
- Join Date
- Aug 2005
Pull out cyl #3 and check it. It might be seizing up on you. Happen to me about 5 years ago at mudbug.
09-30-2012, 09:37 AM #3
so its just getting hung up and forcing the motor to shut off? how would i be able to tell if thats it? i mean if i get it apart and check it out and it looks okay? then what?
ive got new pro x pistons in all 3 cyl's, less than 30 hours on all of them. i just stuck a piston in number 1 and had millenium tech redo that one and put a new pro x in that. theres less than 10 hours on that one, would it be worth it to redo the other 2 and put new slugs in there?
whats that plug look like?
the same thing happened to you, it just shut off while riding it but would start okay?
09-30-2012, 10:41 AM #4
Classic mid-range Lean condition, at 40 mph you are getting hot and it is starting to seize on you.
09-30-2012, 10:54 AM #5
what else can cause that though i just had my carbs done by rich, the plugs look fine except for that one. i mean can it be a piston starting to screw up making it get hot and stick?
09-30-2012, 11:42 AM #6
09-30-2012, 12:57 PM #7
no its rejetted, 110 pilot jets 120 main jet, 1.5 Needle and Seat, 95 gram spring , removed chokes, wsm adapters, k&n FA's
09-30-2012, 03:50 PM #8
could that plug be not firing? when i plug a spark tester in it and crank the boat it sparks, but could it be cutting out? i plan on riding it with the seat off an inline spark testers soon
09-30-2012, 05:32 PM #9
- Join Date
- Aug 2011
that plug to me looks rich. am i the only one who thinks that
09-30-2012, 07:19 PM #10
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By 00gprNC in forum Yamaha PWC Performance (2-stroke)Replies: 9Last Post: 08-04-2009, 04:45 PM
By zimmyjim in forum Polaris Open DiscussionReplies: 1Last Post: 06-21-2009, 07:29 PM
By greeksupra in forum 4-Tec PerformanceReplies: 24Last Post: 03-12-2009, 01:23 PM
By www.partnersautosales.net in forum Yamaha PWC Performance (2-stroke)Replies: 1Last Post: 08-27-2007, 08:49 PM
By born riding in forum Kawasaki PWC Performance (4-stroke)Replies: 25Last Post: 08-27-2007, 02:32 AM