• Welcome to Jetboaters.net!

    We are delighted you have found your way to the best Jet Boaters Forum on the internet! Please consider Signing Up so that you can enjoy all the features and offers on the forum. We have members with boats from all the major manufacturers including Yamaha, Seadoo, Scarab and Chaparral. We don't email you SPAM, and the site is totally non-commercial. So what's to lose? IT IS FREE!

    Membership allows you to ask questions (no matter how mundane), meet up with other jet boaters, see full images (not just thumbnails), browse the member map and qualifies you for members only discounts offered by vendors who run specials for our members only! (It also gets rid of this banner!)

    free hit counter
  • Guest, we are pleased to announce that Hydrophase Ridesteady is offering an extra $100 off for JETBOATERS.NET members on any Ridesteady for Yamaha Speed Control system purchased through March 7th, 2025. Ridesteady is a speed control system (“cruise control”) that uses GPS satellites or engine RPM to keep your boat at the set speed you choose. On twin engine boats, it will also automatically synchronize your engines.

    Click Here for more information>Ride Steady group buy for JetBoaters.net members only

    You can dismiss this Notice by clicking the "X" in the upper right>>>>>

What are these for???

justason said:
Here is a great video on the cooling system of the MR-1.

At the :47 mark the intakes are identified. My understanding is that the pee holes will not always be peeing out water. At idle or no wake speeds the impellers do not create enough pressure to vent thru the pee holes. the cooling loop runs thru the system and branches out in 2 locations (5:15 mark). near the jets and these 2 ports.

Once at speeds the pressure is great enough that the pee holes will vent out the side and report back to you they are working.
Click to expand...

Please what's for fitting in 6:40?
 
Thank you for your explanation.
 
You must log in or register to reply here.

Similar threads

D
LS2000 - Unknown Port in Hull
Replies
3
Views
175
dchale1008
D
E
SWFL Sun - Oxidation and Boat Cover
Replies
9
Views
384
Babin Farms
Babin Farms
W
2001 Challenger 5699 - what size battery?
Replies
3
Views
606
biffdotorg
biffdotorg
B
2010-2012 242 LTD S backrests bolt hole alignment
Replies
3
Views
133
biffdotorg
biffdotorg
nynuthouse
2024 255 FSH Thru-Hull Fitting identification help
Replies
8
Views
436
nynuthouse
nynuthouse
Back
Top