Four stroke weight issues

[Norsky]

I have crestliner 1650 fish hawk with a 50 horse yamaha four stroke on it. I want to go up to a 90 horse Suzuki four stroke but that motor weighs 416 lbs! My yamaha now is 231 lbs. Just wondering if anyone has this 90 horse four stroke motor on this same boat or knows anyone that does?? Is the extra weight an issue? The max HP is 90 for the 1650 fish hawk.

[This message has been edited by Norsky (edited 02-29-2004).]

[196thDLR]

Norsky,this past July I purchased a 75hp 4-stroke tiller for a 1992 1775 Lund Pro-V. The motor weighs about 350lbs. The book shows that a 90hp weighs exactly the same weight. Oh. by the way, it is a Yamaha. I took off a 70hp 2 stroke Yamaha. Hope this helps.

[iffwalleyes]

You should look into a Yamaha 90. I don't know their weight but you sure won't notice with the 40 HP increase.

------------------
Grip it and Rip it

IFFWalleyes
I Fish For Walleyes
[email protected]

[fishermn]

I strongly recommend checking with the boat manufacturer. I have a smaller boat that I put a 4 stroke motor on (at just below the rated max HP) and I ended up with some small fractures in the transom. I talked with Alumacraft and they told me that when that particular boat was designed, the max HP rating did not consider the weight of the 4-stroke engines that are now available. They suggested bringing it into a shop and getting the transom reinforced and re-braced. This is a small boat, so these issues may not exist for a larger boat such as yours, but personally I recommend talking to the manufacturer and finding out if that weight/powe combination is acceptable.

[Norsky]

I have crestliner 1650 fish hawk with a 50 horse yamaha four stroke on it. I want to go up to a 90 horse Suzuki four stroke but that motor weighs 416 lbs! My yamaha now is 231 lbs. Just wondering if anyone has this 90 horse four stroke motor on this same boat or knows anyone that does?? Is the extra weight an issue? The max HP is 90 for the 1650 fish hawk.

[This message has been edited by Norsky (edited 02-29-2004).]

[Surface Tension]

Are sure the max rating is 90 hp? My understanding is 60 hp was the max rating.

[Lundboy14]

Are you sure about the weight of the 90HP? I have a 140 Suzuki 4 stroke and it weights only 410 lbs.

[leechlake]

Norsky is right it weighs 416 pounds, I looked at the online manual. Norsky, the above post about reinforcement is a good question, I'd ask at least two people, make sure one isn't the company you're buying the motor from. Best bet would be to call the boat manufacturer and ask them. Regarding speed, when I take my 120 pound kicker off my Prov I get a couple more mph's that's it. I'd go for it, especially if the boat maker okays the weight. Good luck, go fast.

[muchowja]

ST - It depends upon tiller or console steering. Tiller is probably 60 HP while console is 90 HP.

[Norsky]

I called Crestliner and one of the engineers said that they had figured the weight of the four stroke into the max hp ratings for this boat. He said it shouldn't be a problem but doesn't know of anyone that has the 1650 fish hawk with the 90 horse four stroke. I think I will probably just try it, if I go with the yamaha it will be 370 lbs which is only 140 lbs more than my current 50 horse. Hopefully she'll do around 45 mph, maybe more.

[leechlake]

Norsky, my bro in law has a 16 foot sylvan with wrap around windshield with a 90, it goes upper 40's. Have fun.