Latest Posts:
flame11-23-2024 Gas price in your area (Rep.#7,276) from: stingrayflameflame11-23-2024 Not boat related (Rep.#42) from: stingrayflameflame11-23-2024 The Totally Useless Thread IV (Rep.#164) from: GoFastRacerflameflame11-23-2024 Brrrr (Rep.#14,943) from: GoFastRacerflameflame11-20-2024 Three Word Post.....The Next Generation.... (Rep.#19,431) from: stingrayflame
Home » HD Forums » Forums » Boat Tech » ...jet out of water
No members are browsing this topic
Forum Led by: GoFastRacer
 

[ Track this topic :: Email this topic :: Print this topic ]
add a reply to this topic create a new topic create a new poll
slingingsmokeMale Offline
Boatless

Granada Hills, CA
Posts: 5
APPD 0.00
Post Rank: 409
1995 22' Marlin Sleekcraft/A
Post Icon Posted: May 05 2005,1:56 pm Post # 1 see this member send this member a private message  quote this post in reply
hey folks, just wondering if its ok to start up a jetboat out of the water? and if so, for how long?
Will it grenade the pump?

Thanks, JON.
Back to top
| Member # 1370 | Joined: 4-27-2005 |
MrCordMale Offline
Libra
 HDF Silver Supporter
In need of a River Trip!
1,000 post flame1,000 post flame100 post flame
Irvine Ca
Posts: 2,179
APPD 0.30
Post Rank: 30
28' Magic H-Deck
Post Icon Posted: May 05 2005,2:57 pm Post # 2 see this member send this member a private message  quote this post in reply
I wouldnt without hooking it up to a hose.  I could be wrong but I believe that depending on the pump, some pumps have water lubricated bearings and it is a bad idea to run it without water...  

That could be completely wrong... But I still dont run myne without a hose hooked up...  Plus you are going to build a lot of heat quickly if you are running it for more than a minute...

Never Trust Anyone That Talks Too Fast.... They are hoping you miss something!
Back to top
| Member # 1117 | Joined: 3-01-2005 |
AZKCMale Offline
Leo
 HDF Bronze Supporter
Jack of all trades. Master of none.
10,000 post flame5,000 post flame1,000 post flame100 post flame100 post flame100 post flame100 post flame
Tucson
Posts: 16,439
APPD 2.05
Post Rank: 5
1979 20ft Hawaiian Moonraker
Post Icon Posted: May 05 2005,3:22 pm Post # 3 see this member send this member a private message  quote this post in reply
In the big picture the perfect answer is never start a jet out of water unless its unhooked from the motor. Heat builds on the seals real quick. From what I remember it wears the wear ring out also.

Some guys have built elaborate systems to get water in the pump and others buy jet-a-ways which allows you to disconnect the motor from the pump.

But you still see guys starting them all the time in garages, on the ramps, where ever and they still go down the lake, it seems. Its all kinda what you've got in your pump and what you expect out of it. In the days before I rebuilt my pump I'd run it quite abit on the trailer, but after putting $1800 into it, no more.

Thats my .02

God is Great, Beer is Good, and People are Crazy......

AUTO SAFETY HOUSE

Back to top
| Member # 29 | Joined: 12-18-2002 |
slingingsmokeMale Offline
Boatless

Granada Hills, CA
Posts: 5
APPD 0.00
Post Rank: 409
1995 22' Marlin Sleekcraft/A
Post Icon Posted: May 05 2005,5:39 pm Post # 4 see this member send this member a private message  quote this post in reply
Thanks, AZKC, you answered my question.
Ive also heard that you should plug the intake so all the road debris doesn't get inside the pump. I never really thought of that before. Makes alot of sense though.

JON
Back to top
| Member # 1370 | Joined: 4-27-2005 |
GoFastRacerMale Offline
 HDF Supporter
V-Driver For Life!
50,000 post flame10,000 post flame1,000 post flame1,000 post flame500 post flame100 post flame100 post flame
Big River, Ca
Posts: 62,729
APPD 7.90
Post Rank: 1
Spectra20
Post Icon Posted: May 05 2005,7:58 pm Post # 5 see this member send this member a private message  quote this post in reply
Well the water issue has been solved, as far as the intake goes it's a good idea to plug it up, back in the 80's when I raced NJBA, a lot of guys I knew plugged them up, it's as bad as towing with a prop on, too much garbage on the road!.. :(
Back to top
website  | Member # 101 | Joined: 3-03-2003 |
AZKCMale Offline
Leo
 HDF Bronze Supporter
Jack of all trades. Master of none.
10,000 post flame5,000 post flame1,000 post flame100 post flame100 post flame100 post flame100 post flame
Tucson
Posts: 16,439
APPD 2.05
Post Rank: 5
1979 20ft Hawaiian Moonraker
Post Icon Posted: May 06 2005,7:49 am Post # 6 see this member send this member a private message  quote this post in reply
Quote (slingingsmoke @ May 05 2005,5:39 pm)
Thanks, AZKC, you answered my question.
Ive also heard that you should plug the intake so all the road debris doesn't get inside the pump. I never really thought of that before. Makes alot of sense though.

JON

Again its all in what your trying to protect. Covering the jet intake is something I just heard about. I've towed for years to Apache lake here in AZ and its about 9 miles or more of dirt road and never had any problems. But I can see the reasoning behind it. If I had 4 grand in a tricked out pump I think I'd try to protect it any way I could.

God is Great, Beer is Good, and People are Crazy......

AUTO SAFETY HOUSE

Back to top
| Member # 29 | Joined: 12-18-2002 |
slingingsmokeMale Offline
Boatless

Granada Hills, CA
Posts: 5
APPD 0.00
Post Rank: 409
1995 22' Marlin Sleekcraft/A
Post Icon Posted: May 07 2005,12:23 am Post # 7 see this member send this member a private message  quote this post in reply
will the seals and wear ring still heat up if the pump is not engaged? For example, when its in neutral??
Back to top
| Member # 1370 | Joined: 4-27-2005 |
AZKCMale Offline
Leo
 HDF Bronze Supporter
Jack of all trades. Master of none.
10,000 post flame5,000 post flame1,000 post flame100 post flame100 post flame100 post flame100 post flame
Tucson
Posts: 16,439
APPD 2.05
Post Rank: 5
1979 20ft Hawaiian Moonraker
Post Icon Posted: May 07 2005,7:03 am Post # 8 see this member send this member a private message  quote this post in reply
yep, the shafts are still turning.

God is Great, Beer is Good, and People are Crazy......

AUTO SAFETY HOUSE

Back to top
| Member # 29 | Joined: 12-18-2002 |
GoFastRacerMale Offline
 HDF Supporter
V-Driver For Life!
50,000 post flame10,000 post flame1,000 post flame1,000 post flame500 post flame100 post flame100 post flame
Big River, Ca
Posts: 62,729
APPD 7.90
Post Rank: 1
Spectra20
Post Icon Posted: May 07 2005,7:47 am Post # 9 see this member send this member a private message  quote this post in reply
Quote (slingingsmoke @ May 07 2005,1:23 am)
will the seals and wear ring still heat up if the pump is not engaged? For example, when its in neutral??

There is no neutral the pump is always connected unless you undo the shaft!.. What seems like F/N/R is just water direction, when in "neutral" the water is directed both fore and aft which keeps you from moving either way!.. If you run it in the driveway hook the hose up to it. When you come out of the water and run it the pump still has water around the seals and bearings so it don't harm it for a few seconds, but if it's been sitting in a garage for a while everything is dry and if you run it, you fry things up real quick!.. :eek
Back to top
website  | Member # 101 | Joined: 3-03-2003 |
JetBoatMikeMale Offline
Taurus
Boatless

Beach In New Mexico
Posts: 13
APPD 0.00
Post Rank: 301
20' Southwind old school jet
Post Icon Posted: May 07 2005,12:44 pm Post # 10 see this member send this member a private message  quote this post in reply
I never start my jet out of water. I have to much  $$$$ invested in my pump, Berkley 12jg. I have always covered the intake grate when out of the water. I have fabbed up a carbon fiber cover that fits like a glove. Learned the hard way not to start a jet pump dry, with a panther well that was the problem also.

Old School Jets
Back to top
| Member # 1333 | Joined: 4-20-2005 |
slingingsmokeMale Offline
Boatless

Granada Hills, CA
Posts: 5
APPD 0.00
Post Rank: 409
1995 22' Marlin Sleekcraft/A
Post Icon Posted: May 07 2005,8:15 pm Post # 11 see this member send this member a private message  quote this post in reply
excellent replies, Thanks.
Back to top
| Member # 1370 | Joined: 4-27-2005 |
AZKCMale Offline
Leo
 HDF Bronze Supporter
Jack of all trades. Master of none.
10,000 post flame5,000 post flame1,000 post flame100 post flame100 post flame100 post flame100 post flame
Tucson
Posts: 16,439
APPD 2.05
Post Rank: 5
1979 20ft Hawaiian Moonraker
Post Icon Posted: May 07 2005,9:24 pm Post # 12 see this member send this member a private message  quote this post in reply
Quote (JetBoatMike @ May 07 2005,12:44 pm)
I never start my jet out of water. I have to much  $$$$ invested in my pump, Berkley 12jg. I have always covered the intake grate when out of the water. I have fabbed up a carbon fiber cover that fits like a glove. Learned the hard way not to start a jet pump dry, with a panther well that was the problem also.

Panther  :good The Ultimate Stern Drive  :beer  :drink

God is Great, Beer is Good, and People are Crazy......

AUTO SAFETY HOUSE

Back to top
| Member # 29 | Joined: 12-18-2002 |
11 replies since May 05 2005,1:56 pm < Next Oldest | Next Newest >
 

[ Track this topic :: Email this topic :: Print this topic ]
add a reply to this topic create a new topic create a new poll

Home » HD Forums » Forums » Boat Tech » ...jet out of water

navbarlogo
The Colorado River WebRing
‹ Prev | Hub | Like | Join | Surprise | Next ›

Please help keep HDF free. If you enjoy this site, feel free to make a donation to keep it running. THANKS!