Go Back  R/C Tech Forums > General Forums > RC Boating
Heating problems on Gas Boat >

Heating problems on Gas Boat

Heating problems on Gas Boat

Reply

Old 03-04-2014, 01:33 AM
  #1  
Tech Addict
Thread Starter
iTrader: (11)
 
Join Date: Oct 2008
Location: Collie Western Australia.
Posts: 738
Trader Rating: 11 (100%+)
Default Heating problems on Gas Boat

Hiya..

Scored this massive 2 stroke gas powered boat off a mate dirt cheap.. Got it running in no time flat.

But after about 5 - 10 mins of operation it starts to power down..

Thought it was fuel, but still had plenty and the sintered filter was still below the fuel line.

Thinking it may be the cooling system.. I did notice a flow from the outlet on the side of the boat when it goes past, but is it sufficient?

Just to be sure I thought i would ask if there is anything that can improve this flow?

Clearing lines i spose would be a good start... I assume you can blast compressed air into the small hole in the rudder and check that air comes out the outlet port on the side of the boat.

What about external water pumps?? I imagine you could put one before the motor?

Sorry about the noobness
Stangas is offline  
Reply With Quote
Old 03-04-2014, 04:16 PM
  #2  
Moderator
iTrader: (76)
 
roadrashracing's Avatar
 
Join Date: Nov 2005
Location: Green Bay, Wi
Posts: 13,075
Trader Rating: 76 (100%+)
Default

Take the cooling cap off make sure its clean.
roadrashracing is offline  
Reply With Quote
Old 03-04-2014, 04:43 PM
  #3  
Tech Addict
Thread Starter
iTrader: (11)
 
Join Date: Oct 2008
Location: Collie Western Australia.
Posts: 738
Trader Rating: 11 (100%+)
Default

you mean the cooling ring on the top of the engine?

Will do...
Stangas is offline  
Reply With Quote
Old 03-05-2014, 09:25 PM
  #4  
Tech Addict
 
Ron Olson's Avatar
 
Join Date: Oct 2011
Location: Kalamazoo, MI
Posts: 512
Default

What he said. The cooling jackets can get loaded up with calcium, lime, algae and other junk that can coat the jacket and outside of the cylinder hurting the cooling. The boats also need to be kept up to a decent speed to keep a good flow of water going through the system.
Ron Olson is offline  
Reply With Quote
Old 03-12-2014, 08:38 PM
  #5  
Tech Adept
iTrader: (4)
 
31Bowtie's Avatar
 
Join Date: Jul 2007
Location: Decorah IA.
Posts: 139
Trader Rating: 4 (100%+)
Wink overheating

One thing to remember is in boats its go fast turn right. Turning left can starve the motor of water. Many water rudders have ports on one side . if doing sweeping circles to the left the ports are on the back side of the rudder starved for water. So Cars go left Boats go right! Just another possibility.
31Bowtie is offline  
Reply With Quote
Old 03-31-2014, 08:31 PM
  #6  
Tech Addict
Thread Starter
iTrader: (11)
 
Join Date: Oct 2008
Location: Collie Western Australia.
Posts: 738
Trader Rating: 11 (100%+)
Default

Ok... had a decent look at this boat..

Found that the cooling supply to the motor is not from the rudder at all.. it is from a small pickup in the bottom of the boat that i didnt even realised existed. Come to think about it, that was probably how I got that cut on my hand months and months ago that i couldnt for the life of me figure out what had happened. LOL

The pickup from the rudder goes directly to the exhaust and doesnt seem to exit.. therefore thinking it just exits with the exhaust fumes?

I wonder if the hoses are connected the wrong way? Should the engine be cooled from the rudder pickup?

Do i need both pickups?

Which pick up would be more efficient?

Would a dual pickup rudder be a benifit?
Stangas is offline  
Reply With Quote
Old 04-01-2014, 02:49 PM
  #7  
Moderator
iTrader: (76)
 
roadrashracing's Avatar
 
Join Date: Nov 2005
Location: Green Bay, Wi
Posts: 13,075
Trader Rating: 76 (100%+)
Default

Run it from the rudder to the head and from the head to the exhaust.
roadrashracing is offline  
Reply With Quote
Old 04-01-2014, 06:06 PM
  #8  
Tech Addict
 
Ron Olson's Avatar
 
Join Date: Oct 2011
Location: Kalamazoo, MI
Posts: 512
Default

Make sure that the incoming water line goes to the lowest fitting then exiting out of the upper one.
Ron Olson is offline  
Reply With Quote
Old 04-01-2014, 09:32 PM
  #9  
Tech Addict
Thread Starter
iTrader: (11)
 
Join Date: Oct 2008
Location: Collie Western Australia.
Posts: 738
Trader Rating: 11 (100%+)
Default

cheers guys...

appreciated
Stangas is offline  
Reply With Quote
Old 04-01-2014, 09:56 PM
  #10  
Tech Addict
Thread Starter
iTrader: (11)
 
Join Date: Oct 2008
Location: Collie Western Australia.
Posts: 738
Trader Rating: 11 (100%+)
Default

One more thing..

The exhaust only has an inlet.. no outlet..
it is the cheap tin can exhaust bolted to the side of the cheap motor.. the water must exit with the exhaust fumes?

So i have gone from bottom pick up to the exhaust and the rudder pick up to the motor then out the side of the boat.

I am also investigating in the fuel tank... I cant seem to find a vent? I would assume it was part of the lid? There is not a hole in the top? Maybe i should dremel a tiny hole.. i think i have some 1.5mm drill bits


I am glad this is a fresh water craft.. the ocean would eat this thing alive i would imagine.
Stangas is offline  
Reply With Quote
Old 04-02-2014, 05:54 AM
  #11  
Moderator
iTrader: (76)
 
roadrashracing's Avatar
 
Join Date: Nov 2005
Location: Green Bay, Wi
Posts: 13,075
Trader Rating: 76 (100%+)
Default

How many lines are in the fuel tank, you don't need a vent. I would just leave it how it is.
roadrashracing is offline  
Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service