Potential first time boat purchase

beakerguy6

Cadet
Joined
Jul 23, 2008
Messages
6
I recently found a boat for sale a couple hours away from me. I stopped to take a look and a test drive. It is a 1973 Starcraft Holiday 18' aluminum boat with a mercruiser 140hp stern drive. I am not sure of the out drive.

The boat did not leak near the out drive when we took it out for a test drive. The only problem that he could tell me was that it would stall when putting it in reverse. It stalled when I left it idle without giving it any gas. The boat would shutter and shake at this very low rpm, but smooth out when given gas.

The boat was able to plane out and do about 28mph (2500rpm) and would bog/slow down when taking a sharp corner. From a stand still the boat would take off and plane out but took about 30-45 seconds before it would get a surge of power and sort of take off. The throttle cable appears to need adjustment as it needed to be pushed almost 90 degrees before the engine would respond. The boat also started to back fire as we drove back to the boat landing. The boat had not been run in 2 months or so and had old gas in it from last year(with stabilizer). We didn't run it for a super long time, but it remained at the low end of the temp gauge for the 15 minutes we were out there.

The owner had not performed any maintenance on it aside from changing the oil every season, fogging the cylinders and draining water for winter. The plugs could very well be 2 years old, the wires maybe older. I'm not sure of the lower unit oil. The plugs were dark but not oily.

I did a quick compression check and the cylinders were about 90/110/110/110. I say 'about' because I was trying to do it quick and have not done a compression test before. The gauge may not have been the most accurate as it was a rental(I was told they can vary by 20psi even with identical gauges). I was told it is important that the cylinders are close to one another.

I am just nervous about purchasing my first boat and a 35 year old one at that. I am just wondering of this would be a good purchase. I am not afraid to do maintenance or repair work on anything. So I am looking for feedback on whether this is a good starter boat for me to clean and tune up.
 

beakerguy6

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Joined
Jul 23, 2008
Messages
6
Re: Potential first time boat purchase

No, I read that about the test after the fact. I did not have the throttle plate wide open, nor did I have all the spark plugs pulled out. I was thinking the numbers could have been low because of that.
 

Limited-Time

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Mar 30, 2005
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5,820
Re: Potential first time boat purchase

If you're still interested in the boat.............redo the comp test using the correct procedure............if the numbers cone up the same......................... do as Don suggest......................if they improve.............say to 120 t0 130 range you've got a viable engine..........at least compression wise.......
 

beakerguy6

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Joined
Jul 23, 2008
Messages
6
Re: Potential first time boat purchase

So my compression test is more or less useless in helping me decide to purchase this boat. Would performing the compression test without pulling plugs and opening throttle show lower than normal compression readings? If I could buy this boat for $1000, would it be worth taking the chance on my readings just being on the low end? It seems like a pretty cheap price for what it is. I am just wondering what the chances that this boat runs great under the 5-6 years of gunk built up in the carburetor. If I can get the boat cheap and rebuild the carb, that would be excellent.

Also does anybody know if parts for the Mercruiser 3.0 are hard to come by or expensive? I thought I read that somewhere on a forum. If it is a rare motor to buy parts for, then it may not be a good buy either.
 

Bondo

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Staff member
Joined
Apr 17, 2002
Messages
71,095
Re: Potential first time boat purchase

If I could buy this boat for $1000, would it be worth taking the chance

Ayuh,....

Only if you are prepared to spend the Same amount Again to get it Ship Shape,+ Seaworthy....

It sounds Tried to Me,....
And,...
I'd crawl thru the bilge with an Icepick,....
Rotten Transoms,+ Decks are pretty common in those boats of that age....
 

beakerguy6

Cadet
Joined
Jul 23, 2008
Messages
6
Re: Potential first time boat purchase

Alright, thanks for the advice. I might pass this one up for now. No sense in rushing into a boat that may or may not need a lot of work.
 
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