mercruiser overheating

C

cuzzi23

Cadet
Joined
Nov 7, 2003
Messages
12
Please Help!<br />Just bought first boat.<br />Sea Ray 1989 200 cc Cuddy Cabin I/0<br />Mercruiser V6 4.3L / Alpha One.<br />She runned fine when tested.<br />Change belts ( both looked suspicious ), change water hose from thermostat housing to circulating pump (also looked not too good ). Runned her on Muffs with no problems. <br />Put her water.<br />Runned fine slow at low rpms.<br />Temperature when up when WOT for a few minutes( almost 200 ).<br />Let her iddle, but temperature stayed up ( but not higher) for a few minutes until I shut it off.<br />Started her back after 10 min, temperature was not that high ( about 180 ).<br />Iddle her for 5 minutes and temperature when down to around 140, wich is lower than normal acording to the manual .<br />Sut her off and went home.<br />Sick worry all day today :( <br />I will go down the river today and try her again today.<br />Any ideas , Please ?
 
S

Skipster1

Petty Officer 2nd Class
Joined
Apr 24, 2004
Messages
173
Re: mercruiser overheating

Need more info.<br />Are you sure the belts are tightened correcly?<br />Are you sure the hoses are clamped good?<br />What thermostat do you have? 140? <br />How old is it?<br />Have you taken it out and checked it to see if it is sticking..... or working at all?<br />Have you had an oil change recently/?<br />Have you checked the timing?<br />How heavy a load did you have on the boat when you tested her?
 
C

cuzzi23

Cadet
Joined
Nov 7, 2003
Messages
12
Re: mercruiser overheating

THanks for the respose Skiph !<br />The belts are tight.<br />The hoses are clamped.<br />Do not know what thermostat I have nor howld is it. Manual says suposed to be 165.<br />Oil change done end of last season. (have receips from mechanic ).<br />Have not check the timing. <br />Two people onboard. <br />My first thought was to change thermostat and see what happens ( sent my wife to store today).<br />Need more info ?<br />I'm sorry, I am new to boating.<br />Thanks
 
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