do i need dual cooling

[wayne]

i will be installing a greater yamaha head with higher compression, and a jetworks flow valve on my square.

do i need to run dual cooling or will single cooling be sufficient?

i have a stock 62t/61x dual 38's, r&d pipe (kinda looks like a coffman).

 

[wetjet701]

Hey Wayne do you ride in hot water 70+? If so I'd go duel cooling

 

[Big Kahuna]

if you do not have porting, you would be fine.
but it is cheap insurance.

 

[WFO Speedracer]

Judging by his location I would say go with dual cooling.

 

[wetjet701]

Judging by his location I would say go with dual cooling.

Yep I see Tex I'd def do dual cooling

 

[Freakrider]

higher compression runs hotter and the gulf gets up to 91 degrees here in the Tampa area ...and if one line gets clogged the other saves a smoked or overheated motor....

 

[wayne]

so to go dual cooling do i need to install another line or just use the stock siphon line. I have one 500 gph pump. or can i t/y off of the single line coming in at the bulk head and run two off it. i have to pull my pump to put the hooker impeller from impros on soon.

 

[Scraggly]

i used the factory siphon line. if you t one line your not doing any good.
just add another bilge if you think you need it after removing the factory one.

 

[The Penguin]

use the siphon line, or run a new cooling line through.

T-ing off the single line effectively makes you have single cooling.

 

[Dustin Mustangs]

If you use the stock syphon line you'll also have to retap the pump. Maybe obvious, maybe not?

 

[CarFanatic]

is there a how to on where to tap the line at?

 

[Scraggly]

is there a how to on where to tap the line at?

this will help you see it.

 

[CarFanatic]

you just drill and tap for a 90 degree fitting? What size drill and tap? 1/8 npt?

 

[Scraggly]

you just drill and tap for a 90 degree fitting? What size drill and tap? 1/8 npt?

yup. 1/8 npt tap, .339" drill

http://bobmay.astronomy.net/misc/drillchart.htm

 

[nshalaby]

im running dual cooling right now but wondring how hot is that water going to be coming out i know obviously hotter because its cooling the engine but i was riding the other day and put my hand under it and it was really hot. is that normal?

 

[tipafew]

I wonder what temp is ideal coming out of the motor??

 

[Shifty]

I think around 120* F is what you should be aiming for...

 

[QuickMick]

I changed my ski over from race fuel to pump gas. Now it seems the motor is running hot/hotter. Yes this motor is lightly ported with a Riva Dry pipe.
I shut it down after doing a plug chop and the motor was untouchable for more than a second. Maybe it was running this hot before I changed domes, (33 to 35cc's ada head) I dont know.

would the conversion make it run hotter?
I guess I will go add the dual cooling to be safe. I really dread removing that pipe.. Again!!!

tap the pump, add a second water line to the manifold and dump the front cylinder overboad is that all I have to do?

oh yea I looked at the plugs and they are fine, Im about 80% sure its not running lean.

 

[wayne]

I changed my ski over from race fuel to pump gas. Now it seems the motor is running hot/hotter. Yes this motor is lightly ported with a Riva Dry pipe.
I shut it down after doing a plug chop and the motor was untouchable for more than a second. Maybe it was running this hot before I changed domes, (33 to 35cc's ada head) I dont know.

would the conversion make it run hotter?
I guess I will go add the dual cooling to be safe. I really dread removing that pipe.. Again!!!

tap the pump, add a second water line to the manifold and dump the front cylinder overboad is that all I have to do?

oh yea I looked at the plugs and they are fine, Im about 80% sure its not running lean.

that's my issue. do i just change over to my hooker impeller and do the dual cooling and head as a winter project? i have found out that jetski's are not the same as dirt bikes. i don't want to add dual cooling and the head during riding season. i am not sure if it will run properly if i tear it apart. i know the head and tapping for dual cooling isn't that big of a deal to some, but i don't want to screw it up and be skiless for a while.

 

[WFO Speedracer]

I just did mine but it was a little different,I only had to drill and tap the pump.