enginesilo
Petty Officer 1st Class
- Joined
- Jun 9, 2008
- Messages
- 355
I thought my boat had an issue because I started it on the muffs this year and after about 5-7 minutes the temperature started to climb real high. After lots of feedback I was ready to pull the riser/exhaust manifold but I decided to put the boat in the water for a test ride in the harbor before I did any wrenching. The engine ran cool and the riser never got over 100 degrees, and the manifold and block weren't hotter than 155 anywhere while in the water. The old gauge I had was reading about 20 degree's to hot, so I put in a new one and it maintained around 165-170. However, I was only out for about 20 minutes and I did not rev higher than 2000 rpm's since it was a no wake area.
I brought it back home to flush it on the hose and again it ran cool for about 5-7 minutes with the temperature maintaining around 170 stable on the gauge like it was in the water, then the temperature started to climb and I turned it off before it hit 190+. I know some say you shouldn't stay on the flush muffs for more than 5-10 minutes since they are not efficient at providing the engine with water the way it is designed to, but I have seen posts where people say they can run 30 minutes or more and never experience high temps.
Any idea why this may happen? My next test is going to be to run it hard to see if the temp climbs while cruising at high speeds and working the engine.
I brought it back home to flush it on the hose and again it ran cool for about 5-7 minutes with the temperature maintaining around 170 stable on the gauge like it was in the water, then the temperature started to climb and I turned it off before it hit 190+. I know some say you shouldn't stay on the flush muffs for more than 5-10 minutes since they are not efficient at providing the engine with water the way it is designed to, but I have seen posts where people say they can run 30 minutes or more and never experience high temps.
Any idea why this may happen? My next test is going to be to run it hard to see if the temp climbs while cruising at high speeds and working the engine.