I have a 2006 350 Mag MPI Horizon engine with 1,700 hours on it. Boat is a heavy 24' SF boat. I pulled the heads at 1250 hours, did a valve job with two new exhaust valves. Also changed the timing chain at that time. My boat is only used in salt water.
Engine has no blowby, but has become very rough at idle, etc. 99% sure some exhaust valves are not sealing well. I have not done a compression test yet, but I can hear strange raspy noises at the air intake. I would like to put brand new heads on it, or do a valve job with all new valves. Any recommendations on which Vortex heads to buy? I usually run at about 3,300 to 3,600 for an hour at a time. Fish in an area for the day, then run back at the same speed.
Any recommendation on quality Vortec heads for a heavy boat used in saltwater? Thanks for the replies.
Engine has no blowby, but has become very rough at idle, etc. 99% sure some exhaust valves are not sealing well. I have not done a compression test yet, but I can hear strange raspy noises at the air intake. I would like to put brand new heads on it, or do a valve job with all new valves. Any recommendations on which Vortex heads to buy? I usually run at about 3,300 to 3,600 for an hour at a time. Fish in an area for the day, then run back at the same speed.
Any recommendation on quality Vortec heads for a heavy boat used in saltwater? Thanks for the replies.