First Run ....Not So Good
 

Well i took the 311 out and it lasted about 20 minutes. Powered her up ran down about 1/4 mile everything was ok. Turned around powered her up and about 6 seconds later BOOM port motor let go. The boat felt good and it tracked well but absolutely no speedat all. it only ran 59.3@ 5000 before the BOOM. I am going to have both motors pulled to see what the he** went wrong:( The rooster was cool though:D

if those were 330, you should only run about 4600 max
power band is 4200-4600
5000 is high for cast crank assembly

could the props have been still aerating?

did the engine let go, or something n the driveline ( like is there oil in the bilge?)

we need more data

sorry your day was't successful

I'll prolly call you

Ramb

Not to revel in the misery, but let us know more detail.
I think they put big power in front of those drives, so they should handle the revs; do they have transmissions? Maybe "just" a trans...

The original motors were replaced with these motors in 1997. as far as i could tell with the numbers of the survey and buy looking at the carbs which have the 330 tag on them. As far as the drives the Kaama brochure says the trannys should handle at least 500 hp after that there was no warranty issued by twin disc. What happened is the the motor started losing rpm and started clattering really bad so i shut it down. The oil pressure was 30 and the temp was 170 when the noises started. it sill will turn over slowly and makes a bunch noise doing it. I am going to check the oil for water and pull a valve cover to see if i can determine anything there.

So they're 330s? Pull the valve covers and see what pieces are no longer where they're supposed to be :(
Hopefully just rocker arm broken or loose. If you see broken springs, that could be worse.
Fingers crossed for ya'...

That Sucks Big Ones!!!! Keep Us In The Loop. If I Can Be Any Help Give Me A Call. Lord Knows I Have Had Mine In And Out Enough Times.

i was going to call ya PM you number if ya would. Thanks

Thanks bro!!!!

:( That sucks Jeremy, hopefully not too serious

Josh i will call ya later!

Sorry to hear the news of the first run. Be anxious to hear what you find. Good luck.

Loss of rpm's and grinding noises are never good. If it was knocking too...well, I'd start at the bottom end and work my way up. RPM loss is usually something starting to seize up, like a main or a rod bearing. Good Luck with it. Lots of help here for you!

Dave

Sorry to here about your bad day. Hope it's not to costly. Propwash.

Jeremy i am sorry to here this, thios worrys me too going foward we both sold perfectly good boats and venture into the great wide open, let us no what the results are

I hope all goes well, many of us have been there and it`s not fun stay positive and have one of these:ernaehrung004:

Jeremy, did you get into the engines yet? Wishing the best for ya man.

The Twin Disc trannies are pretty tough. I imagine I'm putting out near 500 horses a side, and the only trouble I had with them is when I blew a transmission cooling hose, lost all the oil, and burned the transmission up. The bad thing is, I had two new transmission cooler hoses that I hadn't installed yet.:rolleyes:

Well some good new some bad

1. pulled the manifolds and valve covers spun the motor over and everything looks to be in order

2. the rockers and springs look ok none broken.

3. pulled the plugs all look good except for one.

Here is the bad the cylinder that we think is bad the plug is RUSTED SOLID in the head:( The head bolts are also toast rusted. I am going to finish up pulling a couple things and get them ready to come out.:D

It'll be interesting to see what more you find out after you pull them and do some tear down.

Good Luck with it.

So was there waterin the oil? How about the oil filter? Did you cut it apart and was there metalic substance? Hopefully not catastrophic and just a good refresh will get you back in business. On the brighter side at least you found this before spring and are able to have things fixed for next season. You will also know exactly what you have when this is done. Good Luck man!

I pulled the dipstick andit seems the oil is fine. To me i have yet to find the real problem. I was thinking last night that when the motor comes out. if i do not find the "smoking gun" then it must be in the trans. I grabbed the prop last night and spun it in neutal and there was no grinding or clunk in the drive.

I just want everyone to know that i did email the previous owner and i did ask him for anything i just thought he should know. He has offered me some parts if i pay the shipping. i say that is a stand up guy:Score-101010:

Head bolts rusted? Spark plug rusted? How do the exhaust manifolds look? Sounds like a leaky manifold/gasket?
Since you're game for having them pulled at least they'll be easy to work on. If you're willing/able, please share what you find, including pics.

Sorry to hear that, ouch!

I know of some nice 525's you could put in - they come with a 311 spare boat :) ha!

Good luck!

did you run the motor in Neutral ?

Would not fire. tried to fire it at the dock and i would not turn over fast enough to hit up.

Well i took the filter off cut it apart and nothing it was clean. No metal or pieces of silicone nothing! Good news is i picked a couple 370 MAG motors that i am having worked on. One is complete and one needs a pair of rectangle port heads one head is cracked:(
Although i knew that when i bought them. I will keep everyone posted as i get more info.

Well here is a couple pics of the motors i took out.:( the second pic shows the rusted spark plug in the cylinder that i think went bad. looks like it has been that way awhile. I just cannot believe the rust on these.


To top it all off I bought some 370's from a guy that told me that one motor needs work the other runs perfect. WELL took them to my builder each motor had burnt pistons. Felice figured well since the cylinders were scored so bad lets bore them. Well the blocks, rods are GREAT now i have a pair of 462's. Went to check the heads. And more bad news the set of rectangles that were suppose to be good are cracked:hothead: This is going to be a LONG LONG winter. Man am i just pissed right now.:angry-smiley-055:

and you say you had this boat surveyed ??

CB I am sorry to hear this, what a pain

Yup. The survey was for the hull only. I had him look inside the engine compartment for me to get the numbers off the block and look for any major problems. Keep in mind i went and saw the boat and drove it myself before the purchase. I did not even see all of this and i looked right at it.

Sorry to hear this. I thought it did not sound good when the seller wouldn't let you push the sticks to full throttle. I'd be f'n pissed.

Good luck getting her back together. Look around for some used heads and get them rebuilt w/ good valves - springs.

I wish i would have known what you would have sold yours for. I know where it would be parked right now!!!

Did I miss something CB:rolleyes:

http://www.marineengineparts.com/sho...ml/page30.html

used rebuilts just give casting numbers, got a set earlier this season. good quality easy to deal with

Good luck.

Looks like they must have been salt water motors. That is the only thing that could get them to look like that. Ussually if they are fresh water they stay looking new for ever... This stinks that you are going through this but at leaste when you are done you will know EXACTLY what you have.

Coulda been worse ........:cool:..

Yeah that is what i keep telling myself but my wife does not see it that way:snide:

YOU TOLD HER!!! What is the matter with you LOL

She was with me on the run. She does not know the total bill this going to be. If she did i would be living in the thing by myself:hitfan: