cost to rebuild a blackmax?

[crazyhunter]

hi all i have a 1983 mercury blackmax 150 xr2. ive had it for a little over a year and it just keeps on giving me problems. its been to the shop mutiple times and still giving me problems. the block i know is solid its got 120psi on all cylinders. i basicaly want to know in the ball park of how much it would cost to replace all the electrical rebuild the carbs. like i said earlier i think the block, piston and rings and all that are still good so i am not going to worry about them. any info is appreciated

 

[crazyhunter]

Re: cost to rebuild a blackmax?

also what would it take to upgrade this motor when i rebuild it to get more power out of it? do they make high performance reeds and can it be bored out with high compression pistons? what else can i do to get the most out of this motor?

 

[b.gagnon]

Re: cost to rebuild a blackmax?

More than the engine is worth!
The parts add up quick.....

 

[crazyhunter]

Re: cost to rebuild a blackmax?

yea i figured it would be alot just trying to get an idea i am starting to study a little to become a marine mechanic and figured this would be a good learning experience rebuilding a motor i already have and i want to make my bass boat go a little faster.

 

[wired247]

Re: cost to rebuild a blackmax?

Bunch of sourpusses. Without getting into troubleshooting your actual problem and replacing whatever it is that needs replacing you'd be looking at ...

$200 or considerably less for a new 16 amp stator depending on if your google foo is strong
$100 each for power packs (2)
$150 for carb rebuild kits. Add $200 for a set of 200 carbs to replace those puny 150's.
A $15 base gasket so when you pull the powerhead to lop a foot off the tuner, it won't leak when it goes back together
$55 to get your heads milled to get your compression up to 140 lbs. $50 for head gaskets.

Thats less than $850 for better reliability and probably about 25 HP.

Is your motor worth more than that? Yes. Can you buy a perfect motor for less ? No.