pameladallaire Posted February 28, 2008 Report Share Posted February 28, 2008 I need to know how large a motor is needed for this boat and for trolling. It is a 1987 springbok with V hull and has a 2 stroke, 50 merc on it. Will a 40 merc, 4 Stroke be big enough to push this? We need to troll with it and have heard that the 50 merc, 4 stroke won't idle down enough to troll. Would like to get rid of the gas powered trolling motor. Have an electric trolling motor for calm days on the water. Need help please. Pam Link to comment Share on other sites More sharing options...
Sinker Posted February 28, 2008 Report Share Posted February 28, 2008 Whats the boat rated for? Seems a little big for a 40, but if it has a 50 on it, maybe that's what its rated for? Check the HP rateing on the plate on the transom. You want to have as close to max HP as you can. A 40 is better than nothing, but you may be underpowered if you get into a "situation" on the water. A 4 stroke 40 or 50 will troll down no problem.....I troll with a 2 stroke 40 with no prob.....I can get it down to 1.5MPH. If I need to go slower, I use the electric. There is also the option of a trolling plate.....lots of guys on this board use them I believe. Sinker Link to comment Share on other sites More sharing options...
Dondorfish Posted February 28, 2008 Report Share Posted February 28, 2008 I have a 50 HP 4 stroke on my 16 &1/2 foot Tracker - trolls right down - no problems. I have a kicker motor ( 8 HP ) for it but didn't even bother to install it. The 50 is cleaner, and way quieter and NO OIL TO MIX WITH GAS and I can honestly say that it gets incredible gas milage while trolling! - Go with the 50 4-stroke - you'll be glad you did! Don Link to comment Share on other sites More sharing options...
Muskieman Posted February 28, 2008 Report Share Posted February 28, 2008 I think that that Peter.. is made of fiberglass and is rated for a 70 ... so maybe add a few horses to the back... Buddy has a similar boat with a 60 E-Tec and does 38 mph on GPS...even slows down to a descent trolling speed.... VERY VERY good on gas. Comparable to a similar Aluminum unit with a 40. Link to comment Share on other sites More sharing options...
Muskieman Posted February 28, 2008 Report Share Posted February 28, 2008 I was looking at the picture and I think I can say that that is'nt a Springbok..... doesn't it say Peterborough on the side? Never mind the 4 strokes go for the high efficiency ,power and lightweight of a E.F.I 2 stroke ... just as good on gas weighs less and pollutes the same....cheaper purchase price. Merc Opti-Max or Evinrude E-Tec Link to comment Share on other sites More sharing options...
Muskieman Posted February 29, 2008 Report Share Posted February 29, 2008 here ya go... Link to comment Share on other sites More sharing options...
pameladallaire Posted February 29, 2008 Author Report Share Posted February 29, 2008 Yes, sorry, it is a Peterborough, and we can't find the transom tag even though our friend is the original owner. Bought in Timmins. We were just wondering about the 50 trolling speed, don't you guys use it on larger water than us? We use it on Mattagami Lake and slow troll for walleye. Thanks again for your help. Pam Link to comment Share on other sites More sharing options...
cranks bait Posted February 29, 2008 Report Share Posted February 29, 2008 I'm also in favour of going with the bigger motor. For trolling slow you can always back troll, use a plate, or put out a drift sock (this is what I use). Link to comment Share on other sites More sharing options...
Sinker Posted February 29, 2008 Report Share Posted February 29, 2008 A 40 4 stroke will troll right down for you.....no prob. If its too fast, add a trolling plate or drag a driftsock/bucket until you get the speed your after. I don't think you'll need it though......the 4 strokes will purr at low idle. Sinker Link to comment Share on other sites More sharing options...
SlowPoke Posted February 29, 2008 Report Share Posted February 29, 2008 I would be less concerned about horsepower and more concerned about weight. Judging by the waterline in the picture, a 40-50 4 stroke might be a bit heavy for the boat considering the 50 2 stroke sits as low as it does. Check the weight of your current motor and compare to the 4 stroke models. Link to comment Share on other sites More sharing options...
David Chong Posted February 29, 2008 Report Share Posted February 29, 2008 Hi Pam, How have you been keeping? A 40/50HP 4 stroke should be able to troll down no problem. You really don't want to under-power your boat too much. Of course I would recommend a Yamaha Cheers, Dave Link to comment Share on other sites More sharing options...
OhioFisherman Posted February 29, 2008 Report Share Posted February 29, 2008 I have trolled for eyes up there with a lot of different boats and motors, same here, even my SeaRay with a 233 hp mercruiser, flat lining. My brother`s 135 merc and a 1.6 or 1.9 sea drive never had a speed issue. Don`t know how big a factor it could be. Link to comment Share on other sites More sharing options...
plankroad Posted March 1, 2008 Report Share Posted March 1, 2008 Before you go nuts on changing engines, very expensive, check how things work now, if it is too fast, there is an idle adjustment that would slow things dowsn, the turn of a screwdriver. If that is too fasr, think of a new propeller for about $130 with less pitch. It will probably be less top speed but idle at a slower boat speed. If the new prop doesn't work, sell it and the motor!!! I hope this helps! Brian Link to comment Share on other sites More sharing options...
sonny Posted March 1, 2008 Report Share Posted March 1, 2008 well i ahve a 60hp merc on a 16.5 legend and mine trolls down to 2 to just under mph if thats any help Link to comment Share on other sites More sharing options...
Corey Posted March 1, 2008 Report Share Posted March 1, 2008 I would get the max recommended for the boat. Link to comment Share on other sites More sharing options...
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