Aq 175 V-6

[my heap]

will this engine replace my AQ 120 b.
Can I just drop it in?
The AQ 175 was connected to a 270 outdrive which is what I have now but being this AQ 175 is a V-6 I need to change gears in outdrive.
Is there anything else I will need to change?
The boat is a 1981 Bayliner Explorer 2670

Thanks

 

[Don S]

Re: Aq 175 V-6

You are going to need an exhaust Y for the V6, and yes, you will need to change gear ratios.

 

[my heap]

Re: Aq 175 V-6

What will the Y pipe cost and how do I look for it online does it have a part number. The engine is 1,350 dollars rebuilt. Could the Y pipe cost around 300-500?

 

[Don S]

Re: Aq 175 V-6

It's going to take a LOT more than just the Y pipe. Depending on the type manifolds and risers the 175 has, you will need elbows and hoses to adapt to the exhaust Y. Since the 175 was never installed with a 270 outdrive and transom shield, it's hard to say exactly what will be needed.
I found the PN for your 270 transom shield, and one for a V8 with the same transom shield and the exhaust Y for a V8 (long V6) has a PN or 835336 which lists for about 900 bucks from Volvo.
Does the 175 have the flywheel cover (aka bellhousing) on it? If not, the one off the 120 will NOT fit.

 

[whywhyzed]

Re: Aq 175 V-6

Contemplating doing this same thing in my one boat I pulled the B36 out of- it actually has a 200/250 (200 lower, 250 upper right now) drive. The biggest expense is the bellhousing/flywheel adapter housing. At least my outdrive is correct ratio (I believe it's 1.59 or 1.61) as my b36b had 180 HP.
Overall it's a big commitment. And I have the 3.8 engines for free to start with. What's the $1350 engine got with it? If it has all electrical, fuel system and exhaust manifolds, it MIGHT be worth it. If it's a long block, or you're eyeballing the V6 shortblocks I have on eBay, forget it.... too much work and $.. a donor boat is always the way to go with these projects. Even a donor OMC or Merc 3.8 powered boat would be better as a starting point.