1988 Johnson 15 tell tale stream

[algul]

Hey y'all. Noob question. As the rpms go up, the stream should get stronger right? Well on my Johnson the stream isn't very strong but it's steady at idle. When I gas it, the stteam doesn't change much. How normal is that.

 

[flyingscott]

Could be partially plugged. Weedeater line works good for.clearing those out

 

[RTripp]

I have the same motor and the stream is consistent at all speeds. It's about the size of a pencil.

 

[thatone123]

I have had similar problems recently with a 15. Posted it here but don't see it. Anyway, mine had a steady stream at all rpm, but was getting hot but still ran fine. Took out the water pump and could not believe the hard old impeller that looked a 1/3 smaller than it should be and the vanes had taken such a set that it could not have been pumping as it should. Just ordered a replacement kit. The pump had sealant gasket material all over it and I wonder if that sealant helps to keep water pressure in the pump??? I have never used any sealant on many water pumps I have replaced of all brand outboards. I think in some OMC repair bulletins I have seen in the past it says to use gasket sealant. Never has any problems without it but maybe it is a good idea???