new to boating i have acquired a 1985 ,,175 johnson thinking of a rebuild. is it worth it,how long can i expect it to last me?Any other opinons are much app.

Is the engine blown or do you just what it freshened up...OPTI

freshed up,what all does this involve?? already done carbs

what prompted you to think about rebuilding - performance issue? with a little bit of care, that motor will still be running when they stop selling gasoline.............

got this boat as a project boat since it was my first i bought a older bass boat now im wandering if i should cut my losses or attempt it.motor is getting better after carb rebuild it now gets on plan but i can only get 3/4 throttle spudders after that the hull needs redecked and thats all,i think.Really need 3 years outta this boat,again its a 86 vip hull with a 175 johnson any ideas??

Since you don't have a location on your post. I would think you need a MAJOR tune-up. That motor should kick just about any boat in the arrrrrrr and do you and it proud/ If your close to San Marcos, come on by and we'll check it out..........

compression test should tell ya what you need to know - expect probably 120's, anything over 100 would be fine,
[edit -- see TLW's post below for compression expectations...sorry bout that]
but more important is the difference between cylinders - if the lowest is within 5 or 7% of the highest, you don't need a rebuild.

did you follow the link & sync procedure in the manual after your carb rebuild?

spark tester (few bucks at autozone), set it at 7/16" and look for a sharp blue snap all around. all plugs should be out for this test and leads need to be grounded to the block.

fuel line holding pressure? is the fuel fresh?

this procedure right here
http://forums.iboats.com/showthread.php?t=158076
will do a world of good.

But compression test before anything else.

Where ya located unionman? I beg ta differ but that motor is only gonna make 80 ta 90 lbs for tha norm. 100 lbs with a little work. They are a low compression motor compared ta Merc. Which VIP have ya got?

not sure what model,think it was the only bass model for that year,19.5 long.Your right i think last compression was around 79 all 6cyl.thanks oh..garland