yamaha 9.9 getting hot

B

bradnkaz

Recruit
Joined
Jul 19, 2004
Messages
5
hi to all :)<br />i have got my self a yamaha 9.9 high thrust outboard(2001 i think) the problem is when its running on tickover there is only dribbles of water comming out, after a couple of minutes steam comes out but if you rev it up a stream of water comes out but verry hot and the engine it self is hot to touch :confused: this is my 1st boat so i am a complete novice at repairing outboards but ill give it a go if i know what the problem is if at all :D any help would be apprechated<br />regards brad
 
J

jrod8v92ti

Seaman
Joined
Jul 4, 2004
Messages
67
Re: yamaha 9.9 getting hot

stop running it please. save some money for a service manual and a water pump repair kit.<br />#1- no matter what breaks in the furture you'll know what it takes to repair it.<br />#2-get to know local outboard service mechanics dont use them, get info from them.<br />cheapest parts,explanations of the book.
 
G

gump218

Cadet
Joined
Mar 27, 2004
Messages
16
Re: yamaha 9.9 getting hot

purchased a used sailboat with the Yamaha T9.9... 4 Stroke. Motor starts fine...spits a little water then nothing. Seems to be dry; then starts gurgling and finally spitting a steady stream; then stops spitting again...Cyclic.. I rebuilt the water pump. New impeller, etc.... Everything is in solid. Still the same sympton... I can disconnect hoses from the power head and get no flow to the pee-hole...<br /><br /> posted July 19, 2004 08:19 PM <br />--------------------------------------------------------------------------------<br />Solved the problem today.... Removed the Exhaust cover and inner exhaust plate. Found several orifices clogged with caked salt and some corrosion. Removed the cylinder head and found the same problem throughout the cooling water path.... Used hot water and a dental pick to remove most of the buildup. Two of the tubes that run adjacent to the spark plugs were so caked that I had to "drill" out the salt...Started with small bits and worked my way up until I got clear passage (checked by blowing through the tube with a rubber hose). <br /><br />Reinstalled everything and tried the flushing attachment. The motor spews water now!<br /><br />I had rebuilt the water pump and checked the thermostat. The local Yamaha dealer told me to hang the engine up and trade for a "New" motor because after 10 years this engine had to be shot... Major corrosion and salt build-up. He offered me $600 for a trade-in. Had nothing to lose so took the plunge at disassembly and repair. I learned a BUNCH and will probably add the tear-down to a periodic maintenance cycle so I don't have to deal with the problem again. I will continue to flush the motor after each use...<br /><br />I love it when a plan comes together!
 
You must log in or register to reply here.
Top