• 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

How to check if the coolant pump is working.

Ralph195

Jet Boat Lover
Messages
41
Reaction score
7
Points
82
Location
North Miami Florida
Boat Make
Scarab
Year
2016
Boat Model
195 G
Boat Length
19
Scarab 195 with 4 tec 200
How to check if the coolant pump is working.
I was out on the boat and the thick hose at the bottom of the coolant tank came off at the engine end and I overheated.
Got towed in!!!!
The next day I put the hose back on the nipple at the engine end (what a mission, you have to push the hose in....clamp down the clamp and if its not on the perfect spot at the nipple the hose will pop off!!!)

The rear hose gets hot so the thermostat is working.
The ride plate gets hot so the coolant is there.
But I keep on overheating in less than 4 minutes and the coolant bottle gets very hot.
So I'm thinking that the pump is not moving the coolant to the ride plate to cool.
Any help is appreciated.
Thank you....
 

Luc Lafreniere

Jetboaters Captain
Staff member
Scarab Forum Lead
Messages
1,280
Reaction score
741
Points
217
Location
Ottawa, Canada
Boat Make
Scarab
Year
2015
Boat Model
165 G
Boat Length
16
How old is the antifreeze? And type? I assume you adjusted the reservoir level after losing some coolant?
 

Ralph195

Jet Boat Lover
Messages
41
Reaction score
7
Points
82
Location
North Miami Florida
Boat Make
Scarab
Year
2016
Boat Model
195 G
Boat Length
19
Hey Luc
I did not see your reply yesterday.
I had Orange BRP coolant in it.
After connecting the hose back, I went and got 6 qt of Orange BRP coolant.
After burping it etc. it took 5 qt of coolant.
So, the coolant is brand new.
Thanks
 

Luc Lafreniere

Jetboaters Captain
Staff member
Scarab Forum Lead
Messages
1,280
Reaction score
741
Points
217
Location
Ottawa, Canada
Boat Make
Scarab
Year
2015
Boat Model
165 G
Boat Length
16
Maybe others will have some more ideas... but based on this, possibly the head gasket. It could have pushed that hose off due to excess pressure/heat. Typically, it will come out of the overflow hose of the reservoir if it's a head gasket. But if the hose was already borderline coming off, the pressure could have pushed it off.

Head gaskets don't fail usually on a 2016 boat, but it is possible.
 
Top