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Hi, I hope you find this useful.
I have a 2009 speedster 150 scic 255hp boat.
I accidentally came across an Australian company promoting what is described as below - they sold me the setup for $30.
Basically, after flushing (salt or fresh) moisture remains in the exhaust.
This moisture can migrate through open cylinder exhaust valves into the cylinder chamber and and on through the intake valve as well. This poses little problem with constant use, but storing for weeks or months will allow gradual corrosion of all those parts including piston and rings, thus shortening motor life.
The Australian company alerted me to the fact that on the plastic intake manifold, in front of each of the 3 cylinders, there is a nipple projecting out which is internally moulded over. By inserting a drill bit in this nipple and drilling through into the intake manifold, you create an vacuum port.
These 3 nipples are joined together with thin tubing to a 4 way barb fitting - the 4th tube is left loose and long enough to reach the bottom of the engine bay. It is plugged with a bung.
After use and flushing, the following is then done.
remove the bung
dip the 4th tube into a bottle of mineral based 2 stroke oil
start the engine and idle until smoke appears at the exhaust
One higher rev and instantly cut ignition.
remove the 4th tube and bung, remove the 2 stroke oil.
What this procedure (which only adds 5 mins to your maintenance after use) does is coats the intake manifold, valves, cylinders and exhaust manifolds with a fine film of 2 stroke oil, inhibiting moisture and therefore prolonging life.
Sure, when you start up, it blows smoke ... a quick 30 sec run before leaving home means no smokey embarrassment in front of all at the boat ramp!
the 3 nipples - access requires the removal of a few parts - easy and takes about 15 mins - the electronic module/bracket on top of the rear end of the intake manifold and the air cleaner are in the way - unscrew the bolts and move aside to access the nipples to drill.
I did this back in June 09 when I bought the boat. No side affects or problems seen or forseeable from doing this mod.
In fact its as though those nipples are there for that purpose - why don't seadoo recommend this ? Why don't dealers ? Maybe more money for them if engines fail sooner.
I hope others find this simple, cheap, but extremely effective mod worthwhile.
I have a 2009 speedster 150 scic 255hp boat.
I accidentally came across an Australian company promoting what is described as below - they sold me the setup for $30.
Basically, after flushing (salt or fresh) moisture remains in the exhaust.
This moisture can migrate through open cylinder exhaust valves into the cylinder chamber and and on through the intake valve as well. This poses little problem with constant use, but storing for weeks or months will allow gradual corrosion of all those parts including piston and rings, thus shortening motor life.
The Australian company alerted me to the fact that on the plastic intake manifold, in front of each of the 3 cylinders, there is a nipple projecting out which is internally moulded over. By inserting a drill bit in this nipple and drilling through into the intake manifold, you create an vacuum port.
These 3 nipples are joined together with thin tubing to a 4 way barb fitting - the 4th tube is left loose and long enough to reach the bottom of the engine bay. It is plugged with a bung.
After use and flushing, the following is then done.
remove the bung
dip the 4th tube into a bottle of mineral based 2 stroke oil
start the engine and idle until smoke appears at the exhaust
One higher rev and instantly cut ignition.
remove the 4th tube and bung, remove the 2 stroke oil.
What this procedure (which only adds 5 mins to your maintenance after use) does is coats the intake manifold, valves, cylinders and exhaust manifolds with a fine film of 2 stroke oil, inhibiting moisture and therefore prolonging life.
Sure, when you start up, it blows smoke ... a quick 30 sec run before leaving home means no smokey embarrassment in front of all at the boat ramp!
the 3 nipples - access requires the removal of a few parts - easy and takes about 15 mins - the electronic module/bracket on top of the rear end of the intake manifold and the air cleaner are in the way - unscrew the bolts and move aside to access the nipples to drill.
I did this back in June 09 when I bought the boat. No side affects or problems seen or forseeable from doing this mod.
In fact its as though those nipples are there for that purpose - why don't seadoo recommend this ? Why don't dealers ? Maybe more money for them if engines fail sooner.
I hope others find this simple, cheap, but extremely effective mod worthwhile.
- reeko, johnnyo and computernt41 like this
