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Author Topic:   Motor Size

weaverf posted 08-15-2001 04:00 PM ET (US)
I am rebuilding a 16/17 ft 1972 whaler. It currently has an old 40 Johnson. I want to upgrade but want some suggestions from those with larger engines.
Bigshot posted 08-15-2001 04:12 PM ET (US)
I have told this a few times and so have others. The olde hulls were designed when engines were lighter(1972 100 Evinrude weighed like 298lbs). I would stay on the lighter end of the scale. To get the max hp I would go with a 90hp Yamaha that weighs approx 260+lbs. Will do low-mid 40's and run like a sewing machine. If going 4 stroke limit yourself on the weight issue(70hp suzuki weighs 335lbs).
Soho posted 08-16-2001 10:58 AM ET (US)
Concur with Bigshot here 100%, I have a 67 Nauset and am re-powering with exactly whatI took off - 90 Yamaha. Looked at the 4S models but decided that the extra weight / cost was not value add for me.
Good Luck
Ron
Mort posted 08-16-2001 05:30 PM ET (US)
I just re-powered my 1973 16/17 with a 50 hp Suzuki 4 stroke (240 lb.) I was concerned about lack of power and pick-up, but was pleased to see that the boat took off fine and with 3 large prople is able to cruise at 28 - 32 mph very easily (this is all the speed I need). This engine is fuel injected so that it is much better 'out of the hole' than a 4 stroke carb. engine.
gvisko posted 08-16-2001 08:28 PM ET (US)
SUZUKI OVER AND OVER AGAIN KEEPS POPING UP
IAM PLEASED WITH MY 7O HP 4 STROKE EFI SUZUKI
I GET 35MPH ON GPS THE WEIGHT IS NOT A PLOBLEM GUESS I MADE RIGHT CHOICE

GV
Dick posted 08-16-2001 09:27 PM ET (US)
Guess I had better put a vote in for Mercury.
I have a Merc 50 HP 4 stroke, 224 lbs, on my 99 Montauk. Motor is mounted 2 holes up and running a 13 pitch prop. Ran it fully loaded last weekend with 750+ lbs of people, gear and fuel. It was on plane quickly and toped out at 32 mph at 5600 rpm.
Could have trimed it up a bit more and picked up a little but the wife was saying slow down.
It is a good combination for me.
Dick

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Author	Topic: Motor Size
weaverf	posted 08-15-2001 04:00 PM ET (US) I am rebuilding a 16/17 ft 1972 whaler. It currently has an old 40 Johnson. I want to upgrade but want some suggestions from those with larger engines.
Bigshot	posted 08-15-2001 04:12 PM ET (US) I have told this a few times and so have others. The olde hulls were designed when engines were lighter(1972 100 Evinrude weighed like 298lbs). I would stay on the lighter end of the scale. To get the max hp I would go with a 90hp Yamaha that weighs approx 260+lbs. Will do low-mid 40's and run like a sewing machine. If going 4 stroke limit yourself on the weight issue(70hp suzuki weighs 335lbs).
Soho	posted 08-16-2001 10:58 AM ET (US) Concur with Bigshot here 100%, I have a 67 Nauset and am re-powering with exactly whatI took off - 90 Yamaha. Looked at the 4S models but decided that the extra weight / cost was not value add for me. Good Luck Ron
Mort	posted 08-16-2001 05:30 PM ET (US) I just re-powered my 1973 16/17 with a 50 hp Suzuki 4 stroke (240 lb.) I was concerned about lack of power and pick-up, but was pleased to see that the boat took off fine and with 3 large prople is able to cruise at 28 - 32 mph very easily (this is all the speed I need). This engine is fuel injected so that it is much better 'out of the hole' than a 4 stroke carb. engine.
gvisko	posted 08-16-2001 08:28 PM ET (US) SUZUKI OVER AND OVER AGAIN KEEPS POPING UP IAM PLEASED WITH MY 7O HP 4 STROKE EFI SUZUKI I GET 35MPH ON GPS THE WEIGHT IS NOT A PLOBLEM GUESS I MADE RIGHT CHOICE GV
Dick	posted 08-16-2001 09:27 PM ET (US) Guess I had better put a vote in for Mercury. I have a Merc 50 HP 4 stroke, 224 lbs, on my 99 Montauk. Motor is mounted 2 holes up and running a 13 pitch prop. Ran it fully loaded last weekend with 750+ lbs of people, gear and fuel. It was on plane quickly and toped out at 32 mph at 5600 rpm. Could have trimed it up a bit more and picked up a little but the wife was saying slow down. It is a good combination for me. Dick