As far as the comment above about restrictors, I think that you are talking about restrictor plates that can be used in some applications instead of thermostats - different issue. Those just act like a thermostat that is always partially open.

Another advantage to crossovers is that they allow more water to pass through the block, thus allowing for better cooling. That's not an issue for most engines, but if you are running a high horsepower it can be a benefit. Also, crossovers are tubing so they don't wear out, where circ pumps bearings, seals, etc can wear out as mine did and were leaking. I have heard of some people's circ pumps seizing - probably rare, but if that happens on the water.... Also less belts, and it is easier to change the sea water pump belt.

I don't think Merc uses crossovers with their new (about 2 years old) pressure dump valves, because if they did, they would be admitting water pressure issues. I actually think it is the pressure valves as they have had problems with some stock setups even with circ pumps. Could be a legal situation they are trying to avoid possibly. Essentially if they were to sell engines with a "fix" now, everyone who had a water pressure problem that ruined an engine in the past could start a class action lawsuit claiming prior flawed designs. Just a guess, but in general that is how big companies work.

Russ ....Thats .009 mph .

You're right, I forgot, I don't have a stepped hull.

Going to refer some questions on Tech forum ...

Guys,

See my comments in a recent thread on circulation pumps in Tech. Crossovers on non-blower motors are just not worth the hassle. I had alot of problems when I tried this years ago. Save your $$$ and your motors. Keep it simple and put circulating pumps on.

Chris

EM's Checked ok ....waiting on Head Test

Offthefront,

No offense, but sometimes the deals you see are less then expected. Sorry to hear of your loss, but my boat for the price I think would have caused you less of a headache! Good Luck with the fix.

Dave

For whatever it's worth, I think that whenever you buy something used, boat, car, bike, whatever, you take a chance. Someone could own a boat for "X" years, taken immaculate care of it, a surveyor could give it "10's" across the board, and the first time out something could go wrong. As in most everything, it's just a roll of the dice.

Especially with boats, as the marine enviroment is the harshest, when you buy a boat older than a few years, you have to expect the unexpected. That's just the way it is. The other side of the fence is you can buy new, and then there is no assurance that something might not break, but you have the warranty to fall back on, but you paid for that warranty by buying new. All in all you either pay one way or you pay the other, but in boating you always pay.

The jury is still out and not sure who or what caused this ...For sure nothing intentionial or knowledge of a problem ....these motors have like 10 hours on them ...in any case in can be fixed ..move foward ..

Axa ..If I rmemeber yours was a 93 ? I still LOVE the older style ...Not that yours is not sweet ... This 10K just puts some plans on a delay ... Mike ...