Thread: gp1300r help movie attached
02-07-2010, 03:59 AM #1
gp1300r help movie attached
Hi guys just took the head off due to having low compression i have attached a movie to show you guys and see if you guys tell me if this is normal the gap between pistons and bore. Thanks again guys
You tube video
02-07-2010, 12:08 PM #2
I do not see a problem, the cylinder walls look good and the pistonwash looks like it is on the rich side. The piston skirts collapse a little over time and that is why you see the movement you do. The important question is what was your compression?
02-07-2010, 04:39 PM #3
Hey mate thanks for taking the time to help me my compression is 110 PSI in front two and 85 in rear cylinder cheers
02-07-2010, 04:57 PM #4
Genraly there is a difference between the #3 and the other two but this seems like it is too much, also all three sound low for a 1300.
How about a little more history on this ski, what problems were you seeing before you pulled the head?
02-07-2010, 05:06 PM #5
hey oside the idel was ruff and the previous owner said he flipped the ski with water getting in, when i took the head off everything was nice and clean. As i said just idel was abit ruff. What should i do next thanks
02-08-2010, 08:58 PM #6
02-08-2010, 09:19 PM #7
if it had water intrusion you may have rod or crank issues. as far as running rough I am not up on the fuel injection stuff. I would definitely consider pulling the cylinders and doing an inspection of the crank and check piston clearances. then is all passes spec do a re-ring minimum.
02-08-2010, 09:43 PM #8
Whats the plugs look like? Its normal to have play in the bore, .006" +/- . Explain how you are doing your compression test and what guage your using. What mods are done? How many hours on the top end?
02-08-2010, 09:49 PM #9
hey woody the whole ski has 76 hours and i think the top end is still from factory, the plugs look good and no mods are done but silly me didnt open the throttle full when doing the compress test would that make the reading low without the throttle open fully ???> i no its silly of me i will have to comp test when i get home with open throttle
Thanks water woody for your reply
02-08-2010, 09:52 PM #10
Open the throttle all the way. Make sure your battery is fully charged. Take another compression test and get back.
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By Pettee in forum Open DiscussionReplies: 4Last Post: 07-26-2007, 12:30 PM
By subarupartsdude in forum Open DiscussionReplies: 1Last Post: 06-28-2007, 09:44 AM
By MikeB in forum Sea Doo Open DiscussionReplies: 7Last Post: 02-16-2007, 11:31 PM
By meirvin in forum Open DiscussionReplies: 2Last Post: 11-12-2006, 12:21 PM
By Green Hulk in forum 4-Tec PerformanceReplies: 46Last Post: 06-30-2005, 10:03 PM