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Two strokes will back-fire through the exhaust due to the pipe being loaded up with fuel.. This can happen because of fouled plugs, leaking carbs, excessive choke or primer...

This is also a...

the beeper should only sound when you ground the overheat sensor terminal.. There is a thermo sensor on top of the head - ground the single wire and the beeper should sound..

try www.seadoomanuals.net for a service manaul

There is a magnet enbedded in the vts rod - may be missing...

That magnet activates limit switches that turn off the vts motor when in full up or...

First thing is remove the carbs and clean them... Rebuilt them is reccommended.. Second thing is the idle speed adjustment or setting.. What is a good 1000 rpm idle in the water - is a screaming...

sounds like the vts buttons are corroded and in need of replacement..

the white pipe is a few mm's wider - port to match or aquire a white manifold

rear electricial box with the coil

check your battery voltage before cranking over the motor and then watch the battery voltage as your cranking the motor cold... then after the engine warms up check your voltages again.. At no point...

test terminal 9 and 16 in connector 1 for battery power - these may be the open terminal pins for your "spare" mpem fusesterminal 2 in connector 2 is a ground

I beleive a lot of people use - http://impros.com - to get their prop repitched..

When I bought my boats, one turned 6950-7050 and the other turned 6850 - I will tell you that these boat will run...

silver motor with white pipe - open flame arrestors with atleast 85 lows and 165 highs - repitched prop to bring max rpm's up to 7000 - on an otherwise stock boat

And since this is a used, but new...

The tps tells the mpem when to change the timing curve... You will find voltage on both the red and (Purple or Brown or Blue) no matter how you test for voltage to ground.. The reason is the tps...

If it sat with water in it for a week - it maybe stuck because of rust..
Which is most like the case if it did not seize while running..
But now it has been sitting way more then a week rusting...

If you went .50mm over then you need to trim .25mm
If you went .75mm over then you need to trim .50mm
And so on..

The stock valves allow for the first .25mm over size piston - after that you...

Increase you high speed screw opening or install a larger main jet.. A larger main jet would be the preferred method..

Brown wire - MPEM connector #3 - pin 15

Actually you may find a 2 pin connecter in the rear of the hull - with a brown wire and a black (ground) wire

you can download a service manual here - www.seadoomanuals.net

And if you can not get it for the trailer value or scrape value - walk away.. You will be dropping a large some of cash into it.. ...

My old oil tank split at the seams.. My NEW oil tank also leaks at the seams too..

http://www.texample.net/media/tikz/examples/PDF/degree-wheel.pdf

there is an index pointer on the crankcase that the edge of the rotary valve needs to align up with, when the mag piston is top dead center..

The process is outlined in the service manual.. If you...

So you premixed your oil tank did ya - if you got all but a small corner of the oil tank drained - dont worry about the amount of fuel delution in the tank.. The oil will be mixed with fuel from the...

A regulator / rectifier will get very hot to the touch - that is why it has cooling fins and a metal body - that stator has an output constant with engine rpm's - as the battery is brought up to full...

Do you have a running problem??

you gotta do a pressure test before pulling it apart again..

Consider this as part of the pricing - http://www.shopsbt.com/jet-skis/jet-ski-engines-crankshafts.html

Depending on how bad things are - the price of needed parts can add up very fast.. ...