Should I put a 100HP Yamaha Four Stroke on my 16ft Hewescraft River Runner

cyclops2

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Re: Should I put a 100HP Yamaha Four Stroke on my 16ft Hewescraft River Runner

Are you doing commerical netting some of the time? Sport fishing some of the time. Would LOVE to WOT the rest of the time ?

When will you sleep ? :)
 

cyclops2

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Re: Should I put a 100HP Yamaha Four Stroke on my 16ft Hewescraft River Runner

GEICO is now owned by State Farm. State Farm used to drop customers for ANY claim many years ago Geico should be the same. State farm was a high premium company.

You need to surf the web for boat insurers......Primary Insurers......I put the Chaparral on Travelers many years ago thru a local agent. Very complete policy. With the full replacement clause.
 

tx1961whaler

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May 31, 2008
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Re: Should I put a 100HP Yamaha Four Stroke on my 16ft Hewescraft River Runner

GEICO is now owned by State Farm. State Farm used to drop customers for ANY claim many years ago Geico should be the same. State farm was a high premium company.

You need to surf the web for boat insurers......Primary Insurers......I put the Chaparral on Travelers many years ago thru a local agent. Very complete policy. With the full replacement clause.

Geico is wholly owned by Berkshire Hathaway (Warren Buffett). They are not owed by State Farm, nor is State Farm owned by Berkshire.
 

cyclops2

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Re: Should I put a 100HP Yamaha Four Stroke on my 16ft Hewescraft River Runner

Last 3 weeks Geico commericals show that they are now a State Farm. A claimer is clearly shone during the last 5 seconds of Geico commericals on my DIRECT tv channels.
 

cyclops2

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Re: Should I put a 100HP Yamaha Four Stroke on my 16ft Hewescraft River Runner

I will watch Geico today for the added insert at the end.
 

speed_demon

Petty Officer 2nd Class
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Mar 20, 2012
Messages
111
Re: Should I put a 100HP Yamaha Four Stroke on my 16ft Hewescraft River Runner

I'm really not worried about insurance. I'm just wanting to know if this motor will damage my boat.
 

Silvertip

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Sep 22, 2003
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Re: Should I put a 100HP Yamaha Four Stroke on my 16ft Hewescraft River Runner

Just gonna hit the high points here ---:)

Outboards are mounted on the very aft end of the boat. Different weights change the center of balance of the boat. If you change the center of balance by adding more weight you change the way the boat handles and it can become unsafe. In a inboard the center of balance also has a lot to do with engine placement and weight but because it is in a position of less leverage it is not as succeptable to changes in engine weight. If there is a dramatic change of weight in an inboard engine, the position of the engine can be changed to relocate the center of balance to a safe position.

HP ratings for outboards are as much related to weight as they are to how fast the boat can go. As was mentioned before, the HP rating is assigned by the manufacturer to meet a number of requirements. First, if it's under 20' it has to level float. Second, the max load rating has to have a reasonable amount of excess above and beyond the engine weight so that the boat is not easily overloaded. Third, outboard boats are not sold with motors (mentioned above). Any motor above 25 hp or motors with full controls are not sold directly to the public, you must buy them and have them correctly rigged by a dealer. This ensures that an oversized motor is not installed on a boat and is a portion of meeting the manufacturers warranty requirements.

Is it against the law for you to install a motor of a higher hp rating than the nameplate say's. No, however, if there is an accident it would be an easy target for a negligence suit. I ran a hot rod motor on a boat and just changed the cowling decals so it was within the max hp of the boat. Nobody but me knew approximately what the hp was and the USCG never questioned it when I went through a voluntary inspection. In otherwords, if you don't tell them, they have no way of proving otherwise unless it's blatently obvious.

The engine in an I/O cannot be located more forward or aft -- the outdrive is positioned on the stern and is not movable. The engine bolts to it. A V-drive configuration is more adjustable. As for boats over 25 HP sold without a motor equiriing rigging by a dealer is not true at all. My last two boats were purchased as "No pre-rig" meaning they had all the instruments, controls, just minus the engine which I installed. Last was an 04 Aluacraft Navigator. The boat still had a max capacity plate in it. Neither a selling dealer OR a private individual should install an engine larger than specified. If either does it, both you and the dealer may be held liable in an accident. You -- because you knew or should have known the engine size. The dealer on the other hand sold you the boat and has no control over what YOU may have installed. As for changing decals, water patrols are not stupid. If you have the fasted 115 on the lake and they see y0u go flying by a 140/150 you can reasonably expect to be checked.
 

Silvertip

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Re: Should I put a 100HP Yamaha Four Stroke on my 16ft Hewescraft River Runner

I called a geico and state farm. A lady at Geico said "that's not too much over" and said she could write the policy but when I asked if I would be covered in case of accident she didn't have a straight answer. State farm said no. On a small claim I doubt they'd check though.

Depending on the type of claim, (personal injury for example) you can bet an attorney will get involved and if you think for one minute that attorneys don't follow this and other forums you'd be sadly mistaken. Get an attoerney involved and whatever you tried to cover up will be uncovered and it will not be to your advantage. Unless it is written into your policy you are on your own. Many folks think about insurance for damage to the boat but they tend to forget about the bodily injury situation. Even minor incidents can turn ugly if it involves the wrong person (and there are lots of them these days).
 

Silvertip

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Sep 22, 2003
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Re: Should I put a 100HP Yamaha Four Stroke on my 16ft Hewescraft River Runner

You are obviously looking for someone to tell you "yes" by all means it's ok to do this. why on earth do you think the boat manufacturer says 80HP? If you can find a 1000# 80 hp outboard go ahead and inistall it and then sue the manufacturer after your boat sinks. Be reasonable here. How HP was rated in the 80's and how it is rated now is of no consequence. 100 HP is 100 HP as far as that plate is concerned. To answer your question "will it affect my boat?" Yes it will affect your boat. How and in what way and compared to "what" nobody can say. Whatever extra weight the 100 HP has over whatever 80 HP the boat would normally have can be compensated by redistributing weight forward. Will the transom be damaged on a hammer down? Depends on the condition and constroction of the transom. Will you have adverse handling characteristics? Very likely "yes".
 

speed_demon

Petty Officer 2nd Class
Joined
Mar 20, 2012
Messages
111
Re: Should I put a 100HP Yamaha Four Stroke on my 16ft Hewescraft River Runner

Silvertip,
I guess I hit a nerve. I have plenty of common sense and know weight and hp can have effects on handling and reliablility. That's why I'm asking the question on what looks to be one of if not the best boat forum online. When you say 80hp means 80hp no matter when the boat was manufactured it makes me think the tag is even more arbitrary because 80hp in 1983 is not 80hp in 2012. In 1983 you would be looking at a 270lb effectively 68hp 2-stroke while in 2012 you could be looking at an 375lb 80hp 4-stroke. They made a ton of these river runners and even more F100 yamaha's. I just figured on a forum as large as this someone would be familiar. I really don't think I'm asking stupid questions. I guess I'll pose another question. Can I install a Yamaha F80?? Same weight and dimensions just 20 less HP.
 

auxsar

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Oct 7, 2011
Messages
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Re: Should I put a 100HP Yamaha Four Stroke on my 16ft Hewescraft River Runner

I have a 1983 16ft Hewescraft River Runner and I'm wondering if it would be wise to install a 100hp Yamaha 4-stroke which I already have. The boat is rated for 80hp max but I've seen people run 115hp but they were all 2-stroke jets. Probably pushing 85hp at the jet and weighing in at about 310lbs. My Yamaha is rated for 100hp but the same motor was renamed 90hp when they came out with the 115 model. It weighs 375lbs which is the same as the 75/80hp model and relatively light for a 100hp 4-stroke. I'm already planning to beef up the transom no matter what engine I use. I'm not only worrying about the power but the weight.

Any help is greatly appreciated.

NO! Your are asking for a ton of legal AND liability problems. If you want to go faster a new boat would be a lot cheaper and safer.
 

toms26t

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May 29, 2012
Messages
20
Re: Should I put a 100HP Yamaha Four Stroke on my 16ft Hewescraft River Runner

As a former member of the Coast Guard Boating Safety Team District 2. We would check the capacity plate during a boarding and compare it to the motor(s) installed. the total HP is what we looked at. For example if you have a single 80 HP motor on a 80 Hp rated transom you are good to go. If at one time you mounted a kicker 5 hp to 15 hp on the same transom we were required to violate your vessel for being over HP rating. The total HP mounted to your boat can not exceed the HP rating on your capacity tag.
 

pootnic

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Aug 11, 2007
Messages
447
Re: Should I put a 100HP Yamaha Four Stroke on my 16ft Hewescraft River Runner

So you mean if I'm maxed out in hp(capacity tag) and I have my electric trolling motor in the water or even on attached to the stern...your going to write me a ticket?Sounds kinda crazy,I thought it was meant for the main motor,not kickers or electrics....time to get on google.:)
Theres alot of boats maxed out,plus they have kickers/electrics...some sold that way?
 

nwcove

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May 16, 2011
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6,293
Re: Should I put a 100HP Yamaha Four Stroke on my 16ft Hewescraft River Runner

As a former member of the Coast Guard Boating Safety Team District 2. We would check the capacity plate during a boarding and compare it to the motor(s) installed. the total HP is what we looked at. For example if you have a single 80 HP motor on a 80 Hp rated transom you are good to go. If at one time you mounted a kicker 5 hp to 15 hp on the same transom we were required to violate your vessel for being over HP rating. The total HP mounted to your boat can not exceed the HP rating on your capacity tag.

ive always considered a kicker motor as more than just a troller, its also an important piece of safety equipment. im shocked that any coast guard would fine someone for having a boat that "on paper" is over the rated hp,because of a kicker, but i guess if your not getting enough speed out of the 250hp ob, dropping the 9.9hp kicker should be as good as a shot of NOS. :facepalm:
 

emoney

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Jul 19, 2010
Messages
2,551
Re: Should I put a 100HP Yamaha Four Stroke on my 16ft Hewescraft River Runner

Pfffftttt....that's why they sell new stickers on Ebay, man. Mount the 100hp but rebadge the cowling to say 80hp. Easy-peasy.**

(heh,heh,heh,heh....namin' my next boat the "flame thrower")




**disclaimer** for those of you not familiar with "Emoney", this response is does not reflect the opinion of any logical thinking person, nor is it to be construed as factual, as this was posted in a writing style known around the world as "sarcasm". Not to be confused with idiocracy.

Having said all that, I'm sure the OP has long decided what he was going to do since this was back in the late Spring, btw. Not exactly "necro-bumping", but skirting the edge a smidgeon, lol.
 

toms26t

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May 29, 2012
Messages
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Re: Should I put a 100HP Yamaha Four Stroke on my 16ft Hewescraft River Runner

PSS, When I said Violate, That does not mean you would get a fine. And we did not look at electric trolling motors. One thing to know is that if you are a inland boater and not on a navigable waterway, You should not see the Regular or Reserves in the USCG but you may see the USCG Aux at a dock or boat launch giving their courtesy inspections. I my self was boarded by the USCG last year and inspected. I have heard over the years it is your insurance company will look for that if there is a accident.
 
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