*Hunter* ... you have Twin Disc MG-506 R & L gears <https://boatdiesel.com/Transmissions/Twin-Disc/Manuals/Twin-Disc-MG-506-R-L-Service-Manual-SM-175-Revised-Issue-B-August-1978.cfm?PDFID=4101314101175&Page=10> ... SM-175 is the # for your Service Manual ...
I have the trolling option on my MG-506 R(ight, aka Stbd) gear ... that side also has an external Purolator cannister filter (TYPE P-192-04-3) in the gear oil cooling circuit (the gear oil for both of my gears is cooled by a vertical, tubular, inboard, closed-side cooling extension to the underside of my San Juan Engineering [now Seakamp] heat exchangers) ... whereas the Port side does not have the cannister filter in-line ... I've never tried my trolling valve out yet. What's happening is you're inducing slipping of the clutch plates in the equipped gear to result in a slowing down of the boat ... that's why Twin Disc specified the addition of the the external cannister filter. I like *Brian*'s thought of the drift socks for simplicity and multi-tasking capability (aka sea-anchors, they can also pull the bow into the weather if you lose power and will slow your drift into hazardous shallows, ect.) if you're by your lonesome and headed in straight lines most of the time ... but my experience at the mouth of the South Arm of the Fraser River in Richmond (part of Greater Vancouver), B.C., Canada tells me that with a high concentration of smaller fishing boats all orbiting around in the shallows off the mouth of the river, commercial traffic literally barging through more or less constantly, and, multiple lines out on downriggers, a cluster-f*&k would quickly ensue ... Seems to me if one of your gears is not already equipped with the trolling valve (and you really gotta' have it), you may be better off to wait 'til one of your gears sh*ts the bed and then swap it out for a good used or rebuilt unit that has that feature ... unless you like throwing $ at stuff ... *Kevin Mc* -- You received this message because you are subscribed to the Google Groups "UnifliteWorld" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/unifliteworld/7476c20f-956e-43ab-8287-1e5013d6aa92o%40googlegroups.com.
