i am kinda new to nitro motors, i am building a 31 inch deep vee and was wanting to know what types of motors to use and does it have to be a marine motor or will any type of nitro engine work, i was thinknig with this size boat thee largest motor i would be able to put in it would be no larger than 7 cc, does this sound right or ???? any help would be great , not sure where to go right now thanks

31" if im right should have a .21/3.5 engine in it check out OS they make good affordable reliable engines and dynamite has a .32 that would work also should be a little cheaper

where is a great place to find these motor and does any type of nitro motor work , say noe that is for a plane or car or buggy and if so what is the difference between the two , just looking for a little help thanks clay

tower hobbies sells them
http://www.osengines.com/ home page for OS

http://www.rcuniverse.com/forum/m_4647653/tm.htm
http://www.rcuniverse.com/forum/m_4442473/tm.htm
some info on running car motors

and here is the link to tower's OS .21 pullstart
http://www2.towerhobbies.com/cgi-bin...?&I=LXALL9&P=7

does it have to be a marine engine or will any work? sorry to keeep asking just searching for a good engine to use

did you read the links I put up for you? The best motor to use for you being new to nitro boats would be a marine engine due to how it cools and parts compatibility, as in flywheels, collets, and such.

i went and read those post you gave me and am undertanding more and more , i was looking a tower hobbies and would this be a ok engine to use also, just making sure i know what to look for when it comes to these things , thanks again , clay

If you want a race engine for marine try a CMB or rossi about 350$-400$ eather way thats why I said OS and dymamite as they are cheaper to buy dont get me wrong still good engines also K&B sells marine engines

Depending on what hull you're looking and I'm kind of guessing here that it may be a Prather, the deck is too high for an air-cooled engine to get enough air to keep it cool.
The other problem is that with most .21 engines made for cars and trucks is that most have slide carbs and the wrong shafts for marine use. Slide carbs just make hooking up the linkage harder but the big thing is the shaft off the crank. The SG shafted engines don't adapt well. you have to cut off the unthreaded part then you really don't have enough threads sticking out once you install a flywheel to hook up the flex cable collet to.

alright thanks for the help i think i found one that would work , http://www2.towerhobbies.com/cgi-bin...P=0#otheritems

what do you think, to much for the boat , good choice or ????

Florence Y'ALL!!!!!!!

Not a bad engine to get your feet wet. Have any place to run the boat??? Might want to come up to Harrison, Ohio on Sept 9th & 10th. The [link=http://www.cincymbc.com/]Cincy Model Boat Club[/link] will be hosting this years Indy Masters. There will be quite a few fast boats there, some even for sale!!!!

i will have to check into that club , just got into the hobby of boats so , i guess i will be up there the 9th or 10th, so you thikn this is a ok engine to start out with

the specs are better on the .21 os than the .32 os
.21 Output: 1.7 hp @ 28,000 rpm
.32 Power Output: 1.1 hp @ 17,000 rpm
just because its bigger doesnt always mean better

i guess , , did not see it that way but thanks alot

thanks alot fellas,

I'd suggest before buying right now, you might want to check out the deals that can be found at a big race. You'll see what is running and what works. Also, the club pres is a CMB dealer, he might give ya a great deal on one. Don't be afraid of walking up to the boaters and ask questions. I'll be at the race with 3 tunnels, 2 yellow and one orange.. Just look for the hippie

HP/RPM: 2.9/36,000 green head CMB 395$
2.9 hp @ 42,000 rpm rossi piranha 324$
High dollar but man I would like to have that rossi

And yes check out the race youll see things youll want and learn lots to!

Mark, you or someone from the Cincy club can make postings on the events calendar and in the nitro forum for the race and I can lock it there until the race is over.
I've seen some fantastic deals on boats at races. One friend of mine used to spend a lot of money buying up just about everything that was for sale. Now he has a bedroom piled from floor to ceiling with stuff then lost interest.

Hi ,Nova Rossie is a good motor But If you want a real screamer Nova Rossie has one.It's a .28 sts that puts out 3.6 hp rpms 4000-40.000 and this motor ran up to 400 degrees and it still runs.Their 122 to 128 dollars.The guy told me that it doesnt mater what small block I'd put in my boat this motor will smoke my boat/kick its butt badly. I'd got a .21Leo its a good motor that has 3500 to 30.000 rpms.I'd won it off of ebay for 42 dollars. Leo Make a naster .21 motor that goes up to 40.000 rpms.And it will cost 60 dollars that includes shipping too.My .21 Leo is a screamer!!! too. If you want to check them out heres their websight.www.leoengines.com the motor is 7220m-21-zp.







i

[link=http://www.rcuniverse.com/community/event.cfm?eventid=2101&begin=90&end=11/24/2006&cobrand=1]24th Annual Indy MASTER[/link]

I'll repeat what ob nut and Ron have said. It would be a really good idea to attend a local race before you choose anything. You can get some REALLY good deals and you will get an idea what people are running.

If you're going to run boats mostly on your own, do not begin with one of the high $ engines from CMB, Nova Rossi, etc. They tend to be harder to setup and get running right. If you don't have help, it's easy to burn them out due to lean runs. The previously suggested OS engines will tend to be easier to setup and represent a much lower initial investment.

When thinking of an engine size, also consider what you plan to do with it. If it's just a fun boat, the size isn't critical. However, if you're thinking of racing, a .21 is a much better size than a .32. The main reason is the common classes are .21 and .45. If

alright , just wanting to know , what are a few websites for the rossi and the other engines that were listed above, just a few would be great thanks clay

http://www.hyperprod.com/
http://www.seaducerboats.com/motor.htm
http://www.rossisales.com/
and you can race .32 in with the .21's which is I think B class if you do the math and look in the IMPBA manual you will find I'm right
The .32 is just under the limit, trust me on this as we had to look when we had our IMPBA race here, it however wont qualify for the RTR class, to big.

whats this dynamite that every oneis talking about , i looked around for that but could not find it at all, and where do you find rules and regulations on the different types of boats