Borg-Warner V Drive

[Agriman]

Can someone tell me if my V Drive is water cooled via a pump/propeller or by scupper under the hull? My starboard Drive is showing 98 degrees after a run but my port side is 128 degrees on my infra-temp. gun. Do I need to clean it out or replace a propeller? Oil levels are good, no temperature alarms have sounded, warning lights off after 1,000 RPM.
Thanks.

[Viper]

Are your v-drives attached to the engines or are they mounted remotely with a shaft and u-joints connecting the drives to the engines? If they're bolted to the engines, the only cooling they'll have is a remote oil cooler mounted on the engine. Ensure it's not clogged with marine growth/debris or old impeller pieces from a previous impeller failure. If they are remote v-drives, they will have their own internal cooler.

[Agriman]

Thanks Viper. I'd say they are connected remotely. They have an inch and one half hose intake and exit water hose from the V-Drive. I'm not sure how the water is pushed through as in by pump or by scuppers when travelling.

[Viper]

For your vintage, seawater should be going into the v-drive, then out and on to the engine. The raw water pump on the engine is what draws the seawater through the system.

[km1125]

QR_BBPOST For your vintage, seawater should be going into the v-drive, then out and on to the engine. The raw water pump on the engine is what draws the seawater through the system.

Viper, that sounds like the v-drive is before the raw water pump... between the seacock and the raw water pump. Is that correct? I've never dealt with these. Would it make more sense to be after the raw water pump, or is it not possible to plumb it that way?

[bud37]

With this particular model 350 Mariner in this year range, the small block/stroker gas engines have trans and gear case joined. Now these have a shared sump, so there is a cooler/heat exchanger that cools the fluid at the top rear of the engine on raw water cooled. The water flow for that is from the thru hull, to the pump then the cooler for the trans /gear case is on the discharge side of the pump. That is for the small blocks, now I don't know about the 454 big block with the small/short shaft between the trans and gear case as I have never seen one like that and followed the hoses.

It would be easy enough to follow the 1.5" water line/hose from the thru hull and see what order everything is in though. I can tell you there is not any extra accessible room down there......

[Viper]

QR_BBPOST

QR_BBPOST For your vintage, seawater should be going into the v-drive, then out and on to the engine. The raw water pump on the engine is what draws the seawater through the system.

Viper, that sounds like the v-drive is before the raw water pump... between the seacock and the raw water pump. Is that correct? I've never dealt with these. Would it make more sense to be after the raw water pump, or is it not possible to plumb it that way?

The Walter drive gets the raw water first in earlier stand-alone models. Some applications didn't even have the assistance of an engine pump. The only way water went through them was by force while you were underway either in forward or reverse. One scoop facing forward and the other facing aft. Water entered in one way or the other and exited the opposite port. You didn't need any cooling while the vessel was stationary as the drive wasn't spinning.

[ColRon]

On my 89 Santego, the set up is the same. The through hull is near the Walter v-drive. In and thru the v-drive and the on to the raw water pump then up and through he trans cooler and on to the engine.