If this is your first visit to the iboats.com Boating Forums, be sure to
check out the FAQ. To post a question or comment, begin by signing up. To start viewing messages,
select the forum that you want to visit from the selection below.
Shop Now - Sign up to recieve a 5% Off promotion code. ** excludes electronics, inflatable boats, trolling motors, outboard engines and monster wake board towers.
Help Tip: If you have a question that has not been answered to your satisfaction in the archives, it is always best to start a new thread of your own. By starting your own thread, you will receive the maximum number of views by forum members.
Below are some additional forum policies in hopes of all iboats members will follow, Thank you.
1. Please do not reply to old topics or hijack existing topics. Old topics of a technical nature are like a library book, Please do not write in them.
2. Old topics should be considered archives and used for reference only. Please do not reply to them.
3. Do not take over someone elseís topic (aka hijack) with your own question, even if it is similar. If you have a question that has not been covered to your satisfaction in the archives, it is always best to start a new topic of your own.
4. If you have a question for the original poster (OP) and the topic is over 30 days old, send the OP a PM, he may not even visit the forums any longer, or may not notice your question in the old topic.
5. By starting your own topic, you will receive the maximum number of views by forum helpers that may not even notice your question when itís posted at the end of someone elseís topic. And those answers will be specific to your particular issue.
6. Please do not post to topics that have been inactive for more than 3 months unless you are the original poster. We have very active forums and any topic that remains inactive for that long should be considered "dead". It is especially confusing when there is an entirely new question posted to an old topic.
7. Posting at the end of any topic is considered to be hijacking the original posters topic which in turn subjects the topic to be closed if it continues to happen thus not making it fair to the original poster in the future had for some reason he/she needed to return for additional information or provide an update of the problem solved which is always welcomed within a reasonable amount of time frame.
8. Please note that you should see a red banner pop up near the bottom of each inactive topic asking you not to reply to old topics. The Red banner will read: Please note this topic has been inactive for 90 days. For the best results, please start a new topic.
Thank you all in advance for doing your part in helping iboats run a smooth ship.
Can anyone tell me the weight difference between a 1989 Mercury 50 and a 1973 Mercury 115 Inline 6? Bought a bigger motor for our pontoon and am curious about how the transom will hold the bigger motor.
Whats the max.hp rating for your toon?If its 115hp or greater and your transom is soild,then go ahead.If transom is suspect or its over the max hp. rating,then id say no.And one more thing,2 strokes are meant to be ran WOT.If that 115 is too much for your boat and you plan on running 1/2 throttle all the time,youre not going to be doing it any favors.
Thank you for the reply. Do you know where I can find what the max hp is for the toons? I looked all around the transom and cant find anything? I took it to our welder to see if he thought it should be reinforced and he seemed to think it was fine the way it is, but I wanted to see what the weight difference is we are talking about. I have manuals for both motors but I can't find it there either.
Not sure if this matters but the pontoon is a 1980 28'
There should be a plate somewhere inside your boat that states the maximum person capacity,weight capacity and max hp capacity.It is required by law on all boats.If it doesnt have one,you need to contact the boat manufacturer and/or do some searching to find out the maxes.Im sure there will be people come on here and say just do it or dont worry about the plate or what not.You can do whatever you wish.Good luck.
Dry weight on that 89 50HP is 188 pounds according to my sources. That makes for a hefty weight difference between the 50 and the 175. From what I've been told, the max hp of a boat is all about weight and manufacturers are somewhat generous in their max ratings. It's a marketing point...
You can put the max rated motor on a boat, but you generally get a little better performance with something at about 2/3 or so than the max rating. You lose a few mph, but you run more efficient because there is less weight bogging the boat down. It also frees up some available weight capacity for carrying people or gear.
You should be able to get hold of the manufacturer of the boat to see what the max weight, person, and HP capacities are. That'll let you know how much you can really drop on there.
Either way, if you do put the 175 on there, you should consider shifting some weight to the front to balance things out.