Engine replacement 305 to 350

J

jballer

Recruit
Joined
Apr 26, 2010
Messages
2
I have a bad 305 volvo, and Im looking to replace it with a 350. I use this boat for trolling. Im looking for some input on this, good or bad. If I should stick with the 305 i will, im just looking for a little more power due to the boat being under powered with a full crew. Im leaning towards a Jasper motor.
 
bomar76

bomar76

Lieutenant Commander
Joined
Jun 27, 2002
Messages
1,963
Re: Engine replacement 305 to 350

350 all the way, there is no valid argument for keeping a 305.

You will need an engine of the same vintage (2 piece main seal or 1 piece)

And as for Jasper...........I personally had a horrid experience with them and several friends also were not happy at all with their engines.

I honestly would drop a GM Goodwrench TRUCK engine in it, change the core plugs.
 
J

jtybt

Senior Chief Petty Officer
Joined
Aug 5, 2009
Messages
730
Re: Engine replacement 305 to 350

I've had friends that had successful swap with the goodwrench swap. They were mechanics, though and changed out the head gasket and freeze plugs. You may be able to get a better 'tow package/power' truck engine(not sure) but for $1300, the Goodwrench swap worked.

I've also heard bad reports on Jasper/warranties.
 
C

chriscraft31

Seaman Apprentice
Joined
Apr 19, 2010
Messages
33
Re: Engine replacement 305 to 350

Go for the 350, you will be pleased. If you have some cash, you can pick up a 300+HP fuel injected package for about $5,500.00, otherwise there are a slough of 260hp carb engines everywhere that will help you get the cre on a plane.
 
J

jballer

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Joined
Apr 26, 2010
Messages
2
Re: Engine replacement 305 to 350

How do I go about getting some info on these motors. Is there a website, or a phone #. I want to have this done in the Saginaw bay area ( michigan). Any of you guys know of a place in michigan that sell these motors?
 
bomar76

bomar76

Lieutenant Commander
Joined
Jun 27, 2002
Messages
1,963
Re: Engine replacement 305 to 350

jballer said:
How do I go about getting some info on these motors. Is there a website, or a phone #. I want to have this done in the Saginaw bay area ( michigan). Any of you guys know of a place in michigan that sell these motors?
Click to expand...

GM Crate Engines:
Summit.com
Jegs.com
GMPerformanceparts.com

and 1,000,000 other places.....and ANY GM dealership sells GM Crate engines

Michiganmotorz.com
Kinda close, been to their facility 5 years ago, sell a lot of engines.
 
C

chriscraft31

Seaman Apprentice
Joined
Apr 19, 2010
Messages
33
Re: Engine replacement 305 to 350

I recently put one together. I found a block on Cl, had it cleaned, honed and cam bearings/core plugs installed. I bought an engine kit off Northern Autoparts online, put it all together with a set of heads I had. I was into it about $500.00
 
DaNinja

DaNinja

Lieutenant
Joined
Jun 11, 2008
Messages
1,407
Re: Engine replacement 305 to 350

FLAT RATE said:
If you are in Mich, I'd give Michigan Motor a call, check out their site at http://www.michiganmotorz.com/ they are located in Troy Mich. and have a good reputation.
Click to expand...

I talked to them just last week since I may have to replace the motor in the SeaRay. They were very helpfull. Not sure if I'm going with a 305 for $1900 or a stroked 350(383) for $2700. The shipping costs may put MI Motors out of the running, though.
 
B

betayv

Senior Chief Petty Officer
Joined
May 13, 2008
Messages
706
Re: Engine replacement 305 to 350

what about ATK anybody have any experience with them I can get a 350 5.7 crate from ATK for 1300$.
 
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