Charging system output on a 1995 Force 90 hp

[Maverick5207]

I'm always lurking on here but haven't posted anything in a few years but couldn't remember my user name or password so I'm a newbie again.
So I have a 1995 Mercury Force 90 hp and I'm trying to find out what the charging system puts out but I can't find it anywhere. I'm contemplating buying an on board alternator from Minn-Kota and upgrading to a 24 volt trolley. I'm guessing I'll have to stick with the 12 volt trolley as my charging system would be too small to charge 2 trolley batteries.
I'd appreciate your help. Thank you.

 

[sam am I]

https://www.cdielectronics.com/product/174-8778k-1/

 

[roscoe]

You are going to need to charge the trolling motor battery on land anyway.

Get the 24v troller if that is what you want/need.

The amount of time needed running at wide open throttle, to put any meaningful amount of juice back into the battery , would be ridiculous.

Better to spend your $100 on an extra battery for more trolling time..

Now, if you were running a huge new 4 stroke with an automotive type alternator, and making long wot runs, it might be a consideration.

 

[Maverick5207]

Well, my fishing is on Lake Powell so I do make some very long runs most of the time and I don't use the trolley hard at all. Mostly just to stay in place. If I'm actually going to troll, I have a 2 hp gas kicker on the back. The only reason I was thinking of going to a 24 volt trolley was because I like the foot peddle of the Minn-Kota better than the Motorguide. I have both trolleys with similar power. My current trolley is the MG of 46 lbs. It's been on the boat for more than 5 years and it has proven to work very well for me and my style of fishing. I fished all last week without charging it and it still had plenty of juice left. My other trolly I have had sitting in the garage for years is a Minn-Kota Maxxum 54 lbs thrust. It's 24 volt though. Either one I'd be very happy with. I just prefer having the momentary switch on the right side of the pedal vs the left like the MG has but I've been using the MG for a long time so either one is fine with me.
Pretty petty I know but I have all the hardware to do any combination. Well, except an additional battery of course. I even already have the one bank on board alternator thing from Minn-Kota so I'm contemplating which way to go. My mechanic looked at my motor and thinks it's the 16 amp system.