bansheejoel
Cadet
- Joined
- Aug 1, 2010
- Messages
- 24
I bought a boat with a 470 in it last year. Runs great but it has always lost a little coolant while sitting over night if i didnt relieve the rad. cap and release the pressure. It never smelled like coolant however today i took it out for the first time this season. It ran good on muffs the day before.
When i went to start it in the water it took forever to start, when it did it blew a decent cloud of white smoke and stunk like coolant. I fished all day and when powering up i could smell the coolant again, pretty much the whole time i was heading to shore (4miles). Got home, checked coolant level and it was low.
Pulled the plugs and 2, 3, and 4 were dark brown. Plug 1 was a little lighter but not much. Checked compression and it was a solid 150 psi on all cylinders. My engine has a newer aluminum exhaust manifold and heat exchanger. Any ideas? Only thing i can think of is maybe the riser gasket is leaking and its burning and going out the exhaust. Any help is appreciated! Thanks
When i went to start it in the water it took forever to start, when it did it blew a decent cloud of white smoke and stunk like coolant. I fished all day and when powering up i could smell the coolant again, pretty much the whole time i was heading to shore (4miles). Got home, checked coolant level and it was low.
Pulled the plugs and 2, 3, and 4 were dark brown. Plug 1 was a little lighter but not much. Checked compression and it was a solid 150 psi on all cylinders. My engine has a newer aluminum exhaust manifold and heat exchanger. Any ideas? Only thing i can think of is maybe the riser gasket is leaking and its burning and going out the exhaust. Any help is appreciated! Thanks