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Author Topic:   Mercury Classic 125-HP and 150-HP

Wet Foot posted 05-10-2004 10:38 AM ET (US)
Is the Mercury 125-HP Classic a good engine? I know it shifts from two cylinder to four cylinder as you reach higher RPM. Is it proven? Dependable? Are there any disadvantages? It is light weight and will put me at the 510-lbs transom weight limit on my Dauntless 18, with a kicker motor.
How about the Mercury 150 HP Classic or 150 EFI? Are they good? I'm avoiding the Optimax because of weight and price. My new Yamaha four-stroke kicker with hydraulic tilt is 117-lbs and my bracket is 15-lbs.
The Optimax puts me 83-lbs over; the 150 Classic puts me 58-lbs over. I can move the battery to the console area to help a little...I can change the scuppers to the ball style. Can you think of anything else to do?
Any thoughts on the lighter, less expensive Classic Mercury motors are appreciated. Opinions on exceeding the transom weight for more power also needed.
Thanks!

LHG posted 05-10-2004 02:07 PM ET (US)
Tell us what you're currently running, so a comparison could be estimated.
Wet Foot posted 05-10-2004 06:14 PM ET (US)
I had the 125Hp Merc. for a short time...only had it out a couple times. It seemed to be rough running at idle, but I did'nt use it enough to come to any conclusions. I am being offered an attractive upgrade to another engine, but others are heavier and cost more. The rough idle might not be typical.
TomT posted 05-14-2004 09:39 AM ET (US)
I run the classic 125 on an 18 dauntless. It idled just a little rough until the merc dealer put plugs and did a Synch and Link procedure and new plugs. I run an electric troller off a transom engine mount linked to the steering so all is operated from the console. May not have the thrust for following sea trolling but is more than plenty in inland lakes.
Do you have an 18 DAUNTLESS?
Given the choice I would power up to the boat's limit as it seems very stable at 41 mph wot and cruises nicely at 33 mph at 4200 rpm.
Wet Foot posted 05-15-2004 02:24 PM ET (US)
Thanks Tom! Yes I have a 2001 18 Dauntless now. I would like more power but my trolling motor is heavy and the 125 Hp keeps me at the transom limit. Even with the 125 HP, my scupper are under water when sitting still. I find this strange because If I'm over 510 Lbs, it's not more than a couple pounds. Whaler's transom weight limit must be the absolute max before your scuppers go under. What year is your Dauntless?

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Author	Topic: Mercury Classic 125-HP and 150-HP
Wet Foot	posted 05-10-2004 10:38 AM ET (US) Is the Mercury 125-HP Classic a good engine? I know it shifts from two cylinder to four cylinder as you reach higher RPM. Is it proven? Dependable? Are there any disadvantages? It is light weight and will put me at the 510-lbs transom weight limit on my Dauntless 18, with a kicker motor. How about the Mercury 150 HP Classic or 150 EFI? Are they good? I'm avoiding the Optimax because of weight and price. My new Yamaha four-stroke kicker with hydraulic tilt is 117-lbs and my bracket is 15-lbs. The Optimax puts me 83-lbs over; the 150 Classic puts me 58-lbs over. I can move the battery to the console area to help a little...I can change the scuppers to the ball style. Can you think of anything else to do? Any thoughts on the lighter, less expensive Classic Mercury motors are appreciated. Opinions on exceeding the transom weight for more power also needed. Thanks!
LHG	posted 05-10-2004 02:07 PM ET (US) Tell us what you're currently running, so a comparison could be estimated.
Wet Foot	posted 05-10-2004 06:14 PM ET (US) I had the 125Hp Merc. for a short time...only had it out a couple times. It seemed to be rough running at idle, but I did'nt use it enough to come to any conclusions. I am being offered an attractive upgrade to another engine, but others are heavier and cost more. The rough idle might not be typical.
TomT	posted 05-14-2004 09:39 AM ET (US) I run the classic 125 on an 18 dauntless. It idled just a little rough until the merc dealer put plugs and did a Synch and Link procedure and new plugs. I run an electric troller off a transom engine mount linked to the steering so all is operated from the console. May not have the thrust for following sea trolling but is more than plenty in inland lakes. Do you have an 18 DAUNTLESS? Given the choice I would power up to the boat's limit as it seems very stable at 41 mph wot and cruises nicely at 33 mph at 4200 rpm.
Wet Foot	posted 05-15-2004 02:24 PM ET (US) Thanks Tom! Yes I have a 2001 18 Dauntless now. I would like more power but my trolling motor is heavy and the 125 Hp keeps me at the transom limit. Even with the 125 HP, my scupper are under water when sitting still. I find this strange because If I'm over 510 Lbs, it's not more than a couple pounds. Whaler's transom weight limit must be the absolute max before your scuppers go under. What year is your Dauntless?