One other question I was curious with buying Boats - do you guys recommend doing an on water 'test drive' or does hooking up a hose usually suffice?
Back in 1981 my little 2 year old 17' Galaxy 4-banger was proving a bit gutless for the skiing we were doing. I found a '77 Kona mini cruiser for sale, 460 Ford/Berkeley jet (sorry about the crappy pic, it's all I have!)
The guy was willing to take my Galaxy in straight across. It was parked in a garage. Being a jet, a no-water test fire for 10 seconds wouldn't hurt anything. Fired right up, rapped up nicely, sounded great!
However, once out of the echo-chamber garage and in the water, it seemed to have a dead spot. Not a normal dead-cylinder dead spot, just not quite right. Idled out to the big water, and it wouldn't get on plane. And, there was some not so nice grindy noises from out back. And, the oil pressure was quite low. AND, we noticed afterwards some oil in the bilge...
Turned out this 4 year old boat had about 40 years worth of (ab)use on it. The reason it sounded 'not quite right': Both the #7 pushrods were broke in half. Their lifters were sitting in the intake valley, which explained the low oil pressure. The fact there was no compression in that cylinder explained why it didn't seem like a 'typical' dead miss. The grindy noises were due to the jet sucking up a log or a boulder or some other bad thing, which bent the impeller and the prop shaft, which caused the gimbal bearing to shatter into pieces. If that wasn't enough, I also found out the boat had sat half-sunk in ocean salt water for who knows how long, which rusted out the bottom of the oil pan. That was weird, because when the oil was cold the pan held the oil, once hot, it would seep thru the million pinholes.
THIS is one reason why a test drive is advisable! But to flip the coin on all those problems, my friend spent an afternoon pulling the jet and the intake manifold, and disassembling the jet. We were able to sand and tweak the impeller until it spun pert near dead-on true. He had the lifter issue fixed in about an hour. I took the shaft to a machine shop that pressed it back straight and did some minor machining to true it up. It took me one weekend to pull the engine to change the oil pan and re-install it. Total cost of the repairs, about 10 hours of our own labor, $30 to fix the shaft, and $16 for a pair of pushrods, and about $40 for the big bearing. Afterwards we had a fast, good running non-oil-leaking boat with plenty of power (and oil pressure)! We had a total blast with it the rest of the summer!
But that was then...
