1994 mercury outboard 150 takes time to pee

Outboardffft

New Member
Well I've had my boat for a couple years and I've always noticed when I start it up The telltale doesn't start peeing immediately it takes around 5 minutes or more before water starts coming out of the telltale. ..

It is a 2.0 Mercury 150 outboard it never really has any problems and I thought it was just because the thermostat wasn't warm enough to start cooling but someone told me it should come out immediately.. but this is also a 1994 so maybe they're thinking of newer outboards what do you think thanks in advance
 

Fun Times

Active Member
Well I've had my boat for a couple years and I've always noticed when I start it up The telltale doesn't start peeing immediately it takes around 5 minutes or more before water starts coming out of the telltale. ..

It is a 2.0 Mercury 150 outboard it never really has any problems and I thought it was just because the thermostat wasn't warm enough to start cooling but someone told me it should come out immediately.. but this is also a 1994 so maybe they're thinking of newer outboards what do you think thanks in advance
Hi there, welcome to endless boating forums...:)

Certain model engines are designed to flow through the thermostats creating a delay to start flowing out the telltale water hole indictor while other models will flow direct/right out the telltale.

As long as the hole isn't clogged up with debris, the rubber impeller is newer and in good strong condition and the thermostats are working properly and their not obstructed with debris from something like old particles of an past/present? broken down rubber impeller or other marine life, all water tubes are clean and clear & aligned up in/from the lower gear case housing/impeller housing on up to the water hose connection points of the engine then the temp delay until warm ought to be normal on your engine....It's been suggested with these designed telltale systems to the thermostats so to help get a better, quicker water flow going outwards for an easier, more confidence feeling that the impeller seems to be operating properly right from the start, would be to drill a small hole in the thermostat flange so it allows a bit of water to get past a cold/closed thermostat until it opens.

Also be sure to keep the end of the telltale water hole clean of bugs, etc. as they can easily get clogged up internally...Either vacuum suck or blow air to the telltale hose to help keep it clean as part of a maintenance schedule/as felt needed

In the following link/conversation there a 3 names to trust CharlieB, Chris1956, j_martin

Please feel free to post your engine serial number if you'd like some help locating a online parts catalog guide and possibly an OEM service manual part number.
 

Outboardffft

New Member
Hi there, welcome to endless boating forums...:)

Certain model engines are designed to flow through the thermostats creating a delay to start flowing out the telltale water hole indictor while other models will flow direct/right out the telltale.

As long as the hole isn't clogged up with debris, the rubber impeller is newer and in good strong condition and the thermostats are working properly and their not obstructed with debris from something like old particles of an past/present? broken down rubber impeller or other marine life, all water tubes are clean and clear & aligned up in/from the lower gear case housing/impeller housing on up to the water hose connection points of the engine then the temp delay until warm ought to be normal on your engine....It's been suggested with these designed telltale systems to the thermostats so to help get a better, quicker water flow going outwards for an easier, more confidence feeling that the impeller seems to be operating properly right from the start, would be to drill a small hole in the thermostat flange so it allows a bit of water to get past a cold/closed thermostat until it opens.

Also be sure to keep the end of the telltale water hole clean of bugs, etc. as they can easily get clogged up internally...Either vacuum suck or blow air to the telltale hose to help keep it clean as part of a maintenance schedule/as felt needed

In the following link/conversation there a 3 names to trust CharlieB, Chris1956, j_martin

Please feel free to post your engine serial number if you'd like some help locating a online parts catalog guide and possibly an OEM service manual part number.
Thank you for the response I think that's good enough for me not to be worried
 
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