I have a 1975 Aristocraft 19 with a GM mercruiser 165 I-6. The exhaust elbow/riser gets too hot to hold my hand on it
( 185*). The rest of the manifold is comfortable to touch and water exiting at the prop is pleasantly warm. The engine is installed so that there is only 1/4 to 1/2 inch between the riser and the rear deck of the fiberglass hull. Lifting the riser up and off the posts looks to be impossible. My question is do I need to remove the whole exhaust manifold to inspect the riser. The previous owner has put thousands into it and it has limited hours since a complete (?) rebuild was done a few years ago. It has a san juan closed cooling system.
I'll post pics in a couple of days if it helps but at the moment it's snowing.
( 185*). The rest of the manifold is comfortable to touch and water exiting at the prop is pleasantly warm. The engine is installed so that there is only 1/4 to 1/2 inch between the riser and the rear deck of the fiberglass hull. Lifting the riser up and off the posts looks to be impossible. My question is do I need to remove the whole exhaust manifold to inspect the riser. The previous owner has put thousands into it and it has limited hours since a complete (?) rebuild was done a few years ago. It has a san juan closed cooling system.
I'll post pics in a couple of days if it helps but at the moment it's snowing.