Impeller or thermostat problem?

Staple

Recruit
Joined
Apr 13, 2002
Messages
2
Bought a 1982 Mariner 50hp 4cly. It did't run,carbs leaking fuel,so I rebuilt the carbs, new floats etc. Now it runs fine at idle but I don't see any water coming out of the pee hose. I wonder if there is a thermostat on this moter and it has to run so long before water flows out or if the impeller is the likely problem?
 

Franki

Lieutenant Junior Grade
Joined
Feb 16, 2002
Messages
1,059
Re: Impeller or thermostat problem?

Don't know specifically if it has one or not.. <br /><br />I can say this however, put the muff on, lots of water pressure.. and start it up, give it 30 seconds or so, and keep putting your finger on the cyl heads,, if they get to hot to touch for more then 5 seconds.. there is a problem..<br /><br />if it hasn't run for ages, it may have a claggged impeller..<br /><br />One thing I did with mine, it was initially blocked or partially obstructed, so I taped the water muffs on hard against the leg.. so there was little or no leakage at pressure.<br />then I ran it for 30 seconds, then cranked the water pressure right up (turned the tap on flat chat.) it blew out some crap and the cooling water did spring from the outlet..<br /><br />anyway.. try it, all sorts of things end up in your cooling system if left uncovered for long periods of time.<br /><br />rgds<br /><br />Frank
 

Staple

Recruit
Joined
Apr 13, 2002
Messages
2
Re: Impeller or thermostat problem?

Well I torn it to it the afternoon. The impeller wasn,t bad to get at. Four nuts and the lower unit slid off with a few taps from a rubber mallet. Removed the plastic cover for the impeller and the ends seem to have taken a set bent in. The rubbber blades have a worn and almost melted look. Now I can see the rubber impeller and a gasket needs to be replaced but what about the waterpump body. Has some groving in metal liner on top, I haven't removed the bottom of the waterpump, its still in the lower unit. Also there is a big rubber seal around the end of exhaust pipe to lower unit, should a guy replace that also?
 

wilde1j

Vice Admiral
Joined
Apr 15, 2002
Messages
5,964
Re: Impeller or thermostat problem?

Get and install a complete water pump kit ... grooves in body or top/bottom of pump body are NG.
 
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