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Author Topic:   Mercury "Laser" series
Monnas Rock posted 11-06-2002 03:26 PM ET (US)   Profile for Monnas Rock   Send Email to Monnas Rock  
The Revenge I have recently purchased, has a Merc. 220hp "Laser" EFI enging on it. The Laser series is alien to me. The boats former owner told me he thought the Laser was Mercury's hot rod motors, modified for increased power output. There is no mention of the Laser designation in the owners manual and, thus far Mercury Marine has not responded to my inquiry. Does anyone out there know about the Laser motors?
Thanks,
Gary
Clark Roberts posted 11-06-2002 03:47 PM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
Gary, the Laser 220 was Merc's first EFI engine (2.4 Liter)and rated at crank I believe so would be approx equal to present 200 EFI (prop rated). Never heard of any problem with them and most likely still a very good engine if it hasn't been abused! Happy Whalin'.... Clark
Monnas Rock posted 11-06-2002 08:18 PM ET (US)     Profile for Monnas Rock  Send Email to Monnas Rock     
Clark,
Thanks for the info. I was supprised to see a 1989 EFI engine. Didn't think they put EFI on outboards that long ago. Actually this engine had a problem in 1993 and Mercury replaced the entire powerhead, under warranty. It has about 450 hours on it and seems to run strong. Hopefully, I've got a good one.
Regards,
Gary
lhg posted 11-07-2002 03:39 PM ET (US)     Profile for lhg    
I'll second Clark's information. I think the recreational EFI's came out (tagged as Lasers) in 1987. At that time they were giving their 2.4 liter V-6's in the racing division the "EFI" name, with the yellow and red graphics, putting out 260 HP. Those were the hot rod outboards, which they still make, and require 91 octane fuel, turning 7500 RPM's. I see, and hear, them occassionally, especially in S FL. Wild sounding outboards, and very expensive, but I have heard their longevity is not good.

In about 1992, when the bock was increased to 2.5 liters, for recreational engines, the Laser name was dropped in favor of the plain EFI name.

Bigshot posted 11-07-2002 04:14 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
The older 2.4L Bridgeports were 240 or 245hp and carbed I believe9not reliable at all). They then came out with the 2.5EFI and that was 260 or 265hp(and much more reliable). Same engine now is 280hp.

Monnas being an 89 engine, you should be rated at the prop. When my bud bought his 1994 Merc 225EFI offshore they said it was more like 250hp so.....

Monnas Rock posted 11-07-2002 07:08 PM ET (US)     Profile for Monnas Rock  Send Email to Monnas Rock     
GEE, MY LAST HOT ROD WAS A SHINNY NEW 75 CORVETTE AND MY NEXT ONE WAS GOING TO BE A ROAD KING CLASSIC! SO, WHAT DO I WIND UP WITH? A HOT ROD WHALER. LIFE IS GOOD!
GARY
lhg posted 11-07-2002 07:19 PM ET (US)     Profile for lhg    
Actually, the recreational Merc EFI's are highly reliable and tame outboards. Only the fuel delivery system is different. The racing EFI's are a different animal.

I wasn't aware they were now squeezing 280 HP out of the same 2.5 liter block they use for the 135 Opti's and conventional 150's.

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