• Help Support TNDeer:

Want to trade small motor for a bigger one?

catman529

catman529

Well-Known Member
Joined
Nov 10, 2010
Messages
29,472
Reaction score
2,552
Location
Franklin TN
See my post in classifieds. http://www.tndeer.com/tndeertalk/ubbthr ... ost3655368

it's a crap shoot but I'm gonna try. I have less than 2 weeks to either find a motor or use what I have.

I have:
35 hp mercury tiller handle long shaft electric start. Year is 1985.

I need:
20 hp give or take, tiller handle short shaft.

Anyone got something? More info on the motor is in the link above.
 
What is your boat rated for hp wise? How big is your your boat? A jet pump for that 35 could get through the shallows. If funds are there. Might still have to get some kind of jackplate or riser if it is a long shaft. Either way. Good luck!
 
Boat doesn't have a rating it's an old late 60s tin boat, very sturdy solid built boat. Guess I will have to run the 35 and see how she handles. I'm gonna need an alternative at some point for skinny waters. Just gotta make surer hat what I got works for the lake trip in May. Then after that I can keep looking for a 20 hp
 
You can probably call the USCG detachment here in Nashville and give them the length and beam measurements and get a rating. If it is the same boat you showed pictures of, my guess would be that the 35 is too much motor.
 
Keep that motor for big water where the long shaft won't be a problem, get you an old 6 hp Johnson or find you a 9.9 for shallows. Should be able to find something for $300 bucks or so. Build you a wheeled motor stand to hold the second motor, swap them out as needed. That's what I'd do. Another thing to consider is trading the boat for one with a 20" transom.
 
TNRazorback said:
Keep that motor for big water where the long shaft won't be a problem, get you an old 6 hp Johnson or find you a 9.9 for shallows. Should be able to find something for $300 bucks or so. Build you a wheeled motor stand to hold the second motor, swap them out as needed. That's what I'd do. Another thing to consider is trading the boat for one with a 20" transom.
Click to expand...
I'd rather get a 15-25 hp to replace what I have and keep the boat. It's a nice boat and I don't see them every day, I like to keep it and change motors

I might use the 35 on the lake next month but keep it to half throttle or less depending on how it handles. I will take for a test ride soon
 
Step One - Compute your Factor

A. Length of Boat x Transom Width (measure in feet: 14, 15.5,16, etc).



Step Two - Compare your factor to H.P. rating

A. 0-35 = 3 hp
B. 36-39 = 5 hp
C. 40-42 = 7.5 hp
D. 43-45 = 10 hp
E. 46-52 = 15 hp



Step Three - If your factor is over 52 (Choose only A or B)

A. With Remote Steering (steering wheel) and at least 20" transom height

Maximum HP = (Your factor x 2) - 90

Example: 19' 6" long , 7 feet wide = (19.5 x 7 x 2) - 90 = 183 (Round up in multiples of 5. This boat's max is 185 hp).


B. With Tiller Steering (hand or extension) or less than 20" transom height (Choose only 1 or 2)

1. Flat bottom, or hard chined boats (hull has hard angles)

Max HP = (Your factor x 0.5) - 15

2. Soft chine, rounded hulls
Max HP = (Your factor x 0.8) - 25


Conclusion

I hope this has helped you all who are looking for max hp ratings. If your boat is insured, make sure to check with your insurance company for any restrictions.

More info here....

http://newboatbuilders.com/pages/hp.html
 

Latest posts

Back
Top