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  Top end:70hp Suzuki 4 stroke.

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Author Topic:   Top end:70hp Suzuki 4 stroke.
ryanwhaler posted 09-06-2004 08:12 PM ET (US)   Profile for ryanwhaler   Send Email to ryanwhaler  
After a few trips in our new 1980 Montauk with 2001 70 hp Suzuki four stroke we didn't check out top end, it was either two choppy or two dark, or my dad just didn't want to go that fast.

Today I took the boat out without him and buried the throttle.

It was me and a friend, I'm about 135 pounds and he's maybe 150. The 28 gallon tank was was maybe 3/4 full.

Water conditions where like glass. It toped out at 36 mph on GPS, I think RPM's where around 5,500. I was spinning a 16 inch prop.

No need to go that fast on this kind of a boat, we either go headway trolling or traveling in choppy water on slow plane most of the time, and won't use this boat for any water sports.

I've read these rigs where good for 38-39 mph.

Just wondering,
What prop will give the best overall performance?

Bigshot?

ryanwhaler posted 09-06-2004 08:38 PM ET (US)     Profile for ryanwhaler  Send Email to ryanwhaler     
Correction:
I was turning a 17" prop.
David Jenkins posted 09-07-2004 08:36 AM ET (US)     Profile for David Jenkins  Send Email to David Jenkins     
You can get an extra 2-3 mph by fine-tuning the trim.
ryanwhaler posted 09-07-2004 06:11 PM ET (US)     Profile for ryanwhaler  Send Email to ryanwhaler     
Bigshot,
What prop do you recomend?
Bigshot posted 09-08-2004 11:55 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
I am running a 13x18 polished SST prop and have hit 39.4 on the GPS. I also have my engine plate about 4-5" above the bottom of the hull, jack plate is about as high as she will go. I run about 5600 WOT with 2 people and will do 38+ on any given day. You need to trim the snot out of these until they are almost blowing out and shooting a nice rooster tail. I have no botom paint but my Newtauk is about 75-100lbs heavier than a montauk.
Bigshot posted 09-08-2004 11:57 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Ps are you still running it with the front seat and trolling motor? If so that is why she is slower, too much bow weight and why I traded JB my 17" for his 18" that he could nolonger swing due to the extra weight.
ryanwhaler posted 09-08-2004 03:11 PM ET (US)     Profile for ryanwhaler  Send Email to ryanwhaler     
Thanks for the reply, Nick.

We'll have to try 18".

Although JB included the trolling motor and seat, I didn't have them in the boat this weekend.

He included two props with the boat, your old prop and a 18" alum spair.

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