evinrude 25HP sparkplugs

[sirius]

Hello,
recommended for this engine are Champion J4J
I found J6C at the engine.
May they be to "cold" for low speed?

Greetings from Germany
Dieter

 

[racerone]

The J6J is a hotter running plug.-----Make sure the thermostat is installed and not stuck open.----Any issues with the running of your motor >

 

[sirius]

The J6J is a hotter running plug.-----Make sure the thermostat is installed and not stuck open.----Any issues with the running of your motor >

Thanks for your message
I will test the thermostat
The plugs are oily

 

[racerone]

I often find thermostat missing or stuck open.