[dvm004]

Hi Rob, yes the shaft slid back from the original location. The nice wrap of braided line, looks like 50lb jbraid, is closer to where shaft sat. I will watch my clearances for the exhaust, the front of the volvo sat significantly higher than the trans due to the in line install. I am hoping to remedy this with the offset zf. This is a pic with volvo/velvet drive gone.

[dvm004]

Thank you for the reply.

1. Understood, this is why we are asking the question. We are trying to understand the relationship between reduction ratios and desired rpms vs prop size and how they all interact. We will continue reading and researching.

2. Our 6bt model number is 44661056 and was out of a 91 diesel pusher. The long block has been rebuilt stock and we have yet to purchase our exhaust manifold, turbo or accessories. The p-pump has been rebuilt to stock as well with a slight air fuel shift for the additional hp changes. This can easily put back to the 190hp that is stock on this setup. The p-pump numbering is 391-9090.

3. The prop that is currently on the boat is a 19 x 15 prop and it is being replaced with the current shaft. The webber cove boats were always limited with the prop size and a 20” would be close to the largest that could fit. This boat is a 1966 and most sections are being completely replaced. The boat yard that is taking the boat this winter is replacing the decks, cabin, windows, and doing the shaft work. They asked if we could pull the old engine and place the new so they have the finished height of decking to build hatches for. The volvo was standard inline drive and rose up into the cabin and covered by an engine box. With using a down angle zf transmission we are hopeful to have the 6bt back to deck height.

The enclosed pictures are from our boat before we pulled the volvo short block. There are 50 gallon fuel tanks port and starboard of the volvo. The second photo is of the current prop and 1.5” shaft we have disconnected the shaft from the old velvet drive before removal but the shaft is still in the boat.

Appreciate the assistance.

[Author]

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