ok, I was joking about gluing the cam back together, but you MUST get a reverse rotation cam, like this one... Chevy 350 Mercruiser Marine Reverse Rotation Cam Kit Lifters Camshaft Lifter | eBay the R on your serial number, I am pretty sure, means reverse rotation. I am not crazy about Jasper, but they build more engines than anybody, so they get more failures than anybody. 100% of the failures generate a complaint. nobody ever comes on and praises Jasper when they don't break. they bore everything to .040. they cut valve seats in too deep. maybe if you wanna come down to S. Jersey sometime we can clean your heads up. I gotta check if I have the right seat stones for your valve sizes. I probably do. bought my antique valve grinder and seat cutter for my big block stuff. 300 bucks, paid for itself in 1 pair of heads... yeah, I still have some 350 heads. i'll play around a little tomorrow and make sure I have stones and pilots and that they do the trick.

Derek,

Can u assemble engine if i bring u block and all necessary parts? Give me your contact info so we can talk about price.

Wow it was as bad as I thought originally. I have to go eat some tums now. Sorry for your loss, i hope things go good . If engine is that bad what about the boat. Maybe keeping an insurance claim in back of your mind would be good thing. That is probably one the worst ones I've seen.

I have installed dozens of Jasper engines in cars, FedEx trucks and boats. I even put one in my mothers boat a couple of years ago. Have never had a complaint or a warranty claim. I believe they are probably the best stock rebuilder out there.

JFC! Sorry to see that. What's the collective guess as to what broke first?

did you cut the rod,s off of the crank with a torch?

ok, there are 350 short blocks on ebay 670 to 1k. at 1k he can get with correct reverse cam. these are bulk rebuilders in texas and tenn. Mabbco in tyler tex,. wholesale engines in dallas, and cyl head and engine rebuilding in athens Tenn. these are 90 day war, which means NO warranty. and 150 to 250 shipping at a guess. anybody have any feedback on them? or would he be better going to rebuilders around him for a little bit more, some say 3 yr 100k warranty, but as soon as you say boat they say NO warranty, but he can look the guy who built it in the eye and drive home with it. of course I just gave away (200 bucks) a good 350 I stared at in my garage for years a couple months ago. anybody got a good 350 gathering dust in the garage close enough to Brooklyn? or know a new York area builder he can trust?

then there is radley chebby dealer. NEW GM goodwrench engine 1674 free shipping. then he has to buy cam kit to reverse it. so roughly 2k for new from GM.

this is 1-piece seal, correct?

I bet you did not run aground. I bet this motor just popped and it felt so bad you thought you ran aground. Because digging your prop into a little bit of mud is not going to make two connecting rods snap and break the camshaft. Motors usually kill themselves. They don't need a lot of outside help.

now, these are the exhaust lobes for 8 and 7? did they do 4-7 swap on reverse rotation engines? because this is 8 and 7 right next to each other. my old small block cam has them all but 180 degrees apart.

last half of firing order sez 6348. Is CW standard or reverse rotation? This valve cover says cw.

It looks might of got some water in the cylinders and hydrolocked and broke the rods.

After some research, looks like CCW is standard rotation. So this is definitely the opposite rotation engine. Now, are the oil drilling in the crankshaft the same? And do the Pistons have to go in the other way for any reason either the offset on the rod or the oil spurt whole or anything like that? Or can you just spin a standard motor backwards with the backwards camshaft?

If this a reverse rotation motor with a gear to gear timing set, you need a standard rotation camshaft. The camshaft need to turn standard rotation for the oil pump to operate in the correct rotation.

That thing got HOT...................oil starved ??

http://www.enginebuildermag.com/2012/09/standard-and-reverse-rotation-marine-engines/

Your going to have to read from th beginning. Kind of a roller coaster ride.

actually, it's a reverse rotation camshaft. It just happens to turn standard Direction, opposite of the crankshaft rotation. The main difference is the opposite firing order.

I am so glad I have bravos. He has transmissions right. Can one be reversed. Then both engines coulbe standard. Life would be easier. Dont know much about the transmissions

Caldera,
When and if you get your boat rinning, pls get a gps chartplotter. You can even get an app for your tablet or cell phone. Navionics U.S and Canada works very good as long as you have reception. There are plenty of used chartplotters out there for sale also. What happened to you was bad but it could have been much worse. Not being sarcastic or demeaning in any way Just looking out for ya. Pete

Nope. Velvet drives run same direction as their engine. Many newer types can be reversed, but not that one. Some borg gear reductions run opposite output from input, but they don't make the same ratio in both output rotations. My trannys in the hatteras are that way. Engines turn in, props turn out, so my opposite rotation engine is on diff side than most.

Hopefully he didn't do damage to the tranny. There has to be more to the boat also . He did hit something .correct

If you have high oil pressure, heavy weight oil and get on plane before the engine is warmed up. It Wil eat the gears. When you install the new gear, it will most likely need to fit for proper play between the dist housing wear plate and gear face. .010 is the gap most use and need. I removed over .010 on my new gear to get the gap right. Mine was melonized gear. Mallory, msd, gm.

I am not sure. He pulled engine with boat in the water still. We will know for sure when the prop is there to see. I think mebbe engine let go and he mistook the noise-vibration for using prop as a depthfinder...I really doubt hitting bottom can snap 2 rods like that. If it did, prop will probably be seriously trashed. Those back 2 rods just look like the bearings failed at speed and snapped them.

Yep im goingto take engine from jasper.

Maybe because cylinder head gaskets were killed.

I didnt hit bottom. I realize that i was wrong. I was on same place with another boat to check how deep is the channel.. looks like engine had problem and that's why blew. This is my opinion.

So the konrads 540 would need the right trannies to get them spinning in .? They are controlled by transmission I've heard.

Im not sure about another engine now. How to avoid same problem? If leftside was ****@up maybe right side is also in bad condition.

Always watch oil pressure and water temps. If the other engine got you back it's probably ok. Unless you want to rebuild it just leave it alone

Then again it is the right time of year to pull engines. Look at here😐 ISSUES

So what is the big pipe elbow on top of the thermo housings?

So Konrad don't have left and right lowers like the TRS they replaced? Cuz Borg Velvet Drives turn the same way the motor does. You gotta flip front pump around for opposite rotation, but you can't just put it in reverse like a bravo and use right hand prop. In fact, reverse isn't even same ratio as forward.

This is the mod I did. The copper tube separates fresh and hot water, thermostat is in the intake manifold under the housing and temp sender is also in the intake. I bored out the ledge that the thermostat sits on, the copper tube sits on bottom ledge and is even with top of housing and the cap holds it down. The elbow is the hot water exiting o it transom next to exhaust tip.

This cap is ugly but temporary and experimental. I am making replacement caps out of thick aluminum or stainless plate to replace them. I'm seriously coconsidering ditching the water pumps for crossover tubes. Dont really need the pumps unless closed cooling is used. Water now feeds exhaust manifold from bottom only. They are way cooler now which means more air flow.

oh good to know. So doing a bravo konrads swap is a pain

yes the paint is coming off the valve covers, like that when I acquired boat. I need taller covers so may not refinish. Using double gaskets .