Ski Boat Forum

Repairs and Maintenance => Engine Repair/Maintenance - All Ski Boats => Topic started by: Baybilly on August 18, 2016, 04:37:44 PM

Title: 1989 Indmar 351 Manifold and Riser Replacement (Need Torque Specs.)
Post by: Baybilly on August 18, 2016, 04:37:44 PM

Hey all, I just ordered manifolds and risers for my new to me 89 Advance. Does anyone know what the torque specs. are for the bolts (manifold and riser)?

Thanks in advance.

Title: Re: 1989 Indmar 351 Manifold and Riser Replacement (Need Torque Specs.)
Post by: backfoot100 on August 23, 2016, 05:55:53 AM

Manifold to head torque on my SBC was 25ft/lbs. I have no idea about the risers though. I would think 15-20ft/lbs would be more than sufficient based on bolt size. Having a clean, straight surface at the manifold/riser junction would be far more important to a good seal.

Title: Re: 1989 Indmar 351 Manifold and Riser Replacement (Need Torque Specs.)
Post by: Baybilly on August 24, 2016, 03:03:40 PM

Thanks for the recommendation!