Thread: SL750 back on the water
07-07-2008, 11:55 AM #1
SL750 back on the water
Ok, so Thanks to some help from everyone, especially Mattman and Tony, I got the stator replaced and have great spark again. Took her oout this weekend and ran roughly 48-50 on DOM at 6050 max rpm. All cylinders look a little lean, so i will richen up an 1/8 on the highs next time I go out.
Beerdart notes the 750 should max at 6300-6400 RPM in a few posts, but I am already teetering on the edge of lean already. What am I missing that will give me the extra 250-300 rpm's. I can get it to about 6150 but get real lean at that point.
I just want a reliable machine, so i want to make sure that I am on the good side of the mix. (BUT, i dont want ot give up any power that I can safely get)
Refresh on already done.
New Fuel Lines
New Fuel pump
New reeds --Torque reeds
.5 over on all three cylinders
Newish crank -1 yr old SBT reman (I know, i know)
newly replaced stator
Removed Water bar added pissers
leak down test good
grease on all intake seals
rtv on all exhaust seals
new br8es plugs
copper seal on head gaskets
cleaned and lubed the electrical board
cleaned and lubed the fuel switch
pump looks good and is quiet when running, no binding
lubed thru hull and zik fitting on drive shaft
Things not changed yet, but thinking of:
stock intake grate
Last edited by seaobin; 07-07-2008 at 11:56 AM. Reason: spelling
07-07-2008, 12:49 PM #2
To get the RPMs up tweak the impeller or open-up the nozzle.
07-07-2008, 01:35 PM #3
So the rpm restriction is the energy needed to push the pump???? If I open the nozle, what model should I go to? Same with Impeller. Mine is all stock at this point
07-07-2008, 01:40 PM #4
You can take some pitch out of the Impeller with an adjustable wrench. To open the nozzle some have used a ridge reamer made for car engine work. Or have a machine shop open it up. Skat sell a nozzle with replaceable rings.
07-07-2008, 01:49 PM #5
so all i need to do is open it a milimeter or so? and are you tallking he pump or the black nozzle that does the steering?
07-07-2008, 01:50 PM #6
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By CynicCE in forum Polaris Open DiscussionReplies: 4Last Post: 07-23-2008, 07:43 AM
By Bryan K in forum Yamaha PWC Performance (2-stroke)Replies: 1Last Post: 04-12-2007, 10:56 PM
By SeaLion in forum Polaris Open DiscussionReplies: 9Last Post: 03-28-2007, 08:34 AM
By RX951 in forum Yamaha PWC Performance (2-stroke)Replies: 20Last Post: 12-07-2006, 08:21 AM
By TorquePhoto in forum 4-Tec PerformanceReplies: 3Last Post: 08-03-2006, 09:46 AM