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Dealer limiting HP

Old 11-09-2018, 11:24 AM
  #41  
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I like the idea of putting boat on plane with one engine.
Sorry, but that's just not going to happen unless you swap props as well. A fairly low percentage of boats with twin outboards will plane off with a single and those are mostly fairly light boat models and 2 strokes stand a better chance because they have more torque at a lower RPM than the 4S.
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Old 11-09-2018, 11:50 AM
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Originally Posted by moklodge View Post
Interesting thread. Title is a bit misleading but works as clickbait.

It seems more like the manufacturer is limiting the hp, not the dealer. How dare they?! And the dealer won't put bigger motors on than the boat is rated for? How dare they!? And the boat is now 18 years old and the dealer won't risk their business to lawsuits by overpowering an OLD Proline that may have weakened (most likely has) with motors that didn't exist when the boat was designed, built or tested. How dare they?!

Seems to me that people are getting angry when the rules don't work in their favor and when those rules are being followed by those that are responsible to abide by them. Dealer is doing what's right. No question.
Well if the manufacturer wanted to limit HP then they should put placard saying max HP is ...... not just put a yacht certificate and no HP rating.
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Old 11-09-2018, 12:14 PM
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ive heard most folks keep a spare prop for running one engine
not sure how that is to swap on the water
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Old 11-09-2018, 12:36 PM
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The US Code of Federal Regulations (CFR) has a chapter on boat compliance and it has the formula for computing maximum horsepower. Basically, it has to do with length of the boat and transom width.
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Old 11-09-2018, 01:43 PM
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Originally Posted by Cobia206 View Post
The US Code of Federal Regulations (CFR) has a chapter on boat compliance and it has the formula for computing maximum horsepower. Basically, it has to do with length of the boat and transom width.
thank you!!!! Finally a Hull Truth answer! So 600hp it is. Here is a link for anyone wonder legally what the government says about max HP.

CFR-2001-title33-vol2-sec183-53.pdf
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Old 11-09-2018, 02:01 PM
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Funny caveat. If your current engines are 225 optimax, I bet they produce more torque / stress on the transom than today's 300 Zukes. Also, depending how much you want to push a single, you're only going to get a couple MPH more out of a 300 vs 225 when a motor is down. A single 300 Zuke is not going to get close to planing your boat.
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Old 11-09-2018, 02:08 PM
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I went from 450 to 600 - get ready to really enjoy your new boat. My experience was the first dealer said no, second dealer said they'd make an exception, the third kinda laughed at me when I asked and said they'd hang whatever I wanted back there.
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Old 11-09-2018, 02:09 PM
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You are welcomed !!!
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Old 11-09-2018, 02:20 PM
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Can't blame the shop for wanting to limit liability. Probably got burned once and now are more careful. Keep shopping around.
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Old 11-09-2018, 03:15 PM
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Originally Posted by whatta life View Post
your an idiot
While I definitely don't share the opinion of buttapollock, name calling is usually due to one's lack of ability to validate a point of view using logic and reason. "Your" not helping yourself.
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Old 11-09-2018, 03:22 PM
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When I wanted to repower a boat last year, I went to the Suzuki sealer. I wanted to replace my F200 Yamaha. The dealer told me, if I wanted the same performance I would need to repower with a larger Suzuki. So, donít think you will be improving performance that much.
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Old 11-10-2018, 06:52 PM
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Originally Posted by Jonnyu View Post

thank you!!!! Finally a Hull Truth answer! So 600hp it is. Here is a link for anyone wonder legally what the government says about max HP.

Attachment 1089402

It states the maximum a size of boat can be rated. I would read it that a manufacturer can choose to rate it for a lower max hp. Talk to your insurance company with full disclosure of all the relevant facts (i.e. the fact the brochure says max 500hp) If they OK it (I would only take it as an OK once it's in writing), take the document and the proof that the insurance company are happy to the dealer. Bear in mind it is still their choice to refuse to sell and install it though.

Your situation reminds me of a time when I was working for a printing company - a guy came in and wanted us to print something that was on the edge of being legal. I took professional legal advice and was told, "It could land you in court, and whilst you would have a very good case, do you really want to risk that hassle for one sale?"

The customer (or rather potential customer) was very annoyed, but no way was I going to risk all the hassle, expense and time of possibly ending up in court.
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Old 11-11-2018, 02:25 AM
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Originally Posted by Jonnyu View Post

thank you!!!! Finally a Hull Truth answer! So 600hp it is. Here is a link for anyone wonder legally what the government says about max HP.

Attachment 1089402
You will want to read the whole thing, not just the formula.

Because the formula is just the starting point to give MANUFACTURERS the theoretical maximum, which is then subject to successful completion of the onwater test course. Which someone suitably qualified is going to have to certify under their name on behalf of the manufacturer.

Due to liability issues, not many will be willing to rate their boats at higher hp than that.

Those same provisions must be intrnationally accepted - they are replicated in the Australian Small Boats standard as well.
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Old 11-11-2018, 04:42 AM
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I have twin g2 250s on my 2950. with out canvas I can get to 52 mph with canvas I see 51 mph full fuel. I think there is a member who has 300s zukes and he does like 54 mph. I have better fuel burn numbers then him though. that all said I think with 250 suzuki engines your going to see 49-50 mph easy if not the same as I am getting. I cruise between 30-35 at 1.7 mpg and at full throttle I see 1.2 mpg. that said I have had a ton of steering problems with my G2 engines and lost a lower unit before 210 hrs. honestly though 300s on that hull is a waste and your will spend 90 percent of your time between 25-40 mph you will very rarely see 45 because of water conditions it has to be like glass to run that hull at 45+.
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Old 11-11-2018, 04:42 AM
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Don't forget that some states also have their own laws concerning overpowering boats which have a manufacturer's horsepower limit.
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Old 11-11-2018, 05:21 AM
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It is illegal to exceed your rated horsepower in some states. For example, Ohio. It may also void your insurance coverage.

As to your manufacturer helping you in re-rating a 20 year old hull for more HP: Not a chance in hell.
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Old 11-11-2018, 05:32 AM
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Problem solved:

http://discontinueddecals.com/store/...ty-Decals.aspx

You're welcome 😎
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Old 11-11-2018, 05:54 AM
  #58  
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Put a mercury on it - 250ís and then chip the HP up.

My buddy owns a very large mercury dealership and thatís what he did to his own motor. I think he went from 250 to 325. They are the exact same motors but chipped differently. He has brought it up with mercury and asked why he has to pay more for the bigger motors when all they have is different programming and stickers and they get pissed when he brings it up. Itís BS

PM me if you want and Iíll ask him where he got the chip and you can call them.

Not sure if you can do it with Suzukiís but I bet itís the same. Iím guessing the company that does it can give you all the info you need.

BTW - he has popped rivers on the Lund it is on though.
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Old 11-11-2018, 06:05 AM
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Supercharged vs Naturally aspirated.
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Old 11-11-2018, 06:11 AM
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The formula is for 20' and under, I realize, BUT using that formula for my 22' (23'-7" OAL), I should be rated for 300hp+ but Proline rated it for 225, so IF the company was using formulas rather than testing, they were VERY conservative in their rating. Since my boat tops out at 40mph with a 200hp OX66 with no handling issues, I'm sure it could handle MUCH more. However, how many 225+ outboards were really available in 2004? I know the 250's were out there, but perhaps they were putting 225hp limit on the 22' so the 23 guys would feel better about their 250hp limit.
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