Manifolds and Risers Time

Ben Levitt

Member
Jul 18, 2018
38
Crownsville, Maryland
Boat Info
2013 240 SunDeck
Engines
5.0 Mercrusier Bravo III
How many hours for a mechanic to replace manifolds and risers - 2013 240 Sundeck with a 5.0 MPI. I have received quotes from 3 hours to 8. Which is it?
 
Had mine done in April. 3 hours, at $100 an hour. $300 labor. Parts was $1400 using Mercruiser parts not aftermarket, 7.4. Included new plugs (easy replace while mans off). Was some other parts included in price, flappers, rubber connectors, couple other things.
 
I can’t say for sure but 8 seems a bit much even if it is a corroded mess with difficult access. I’d dump that estimate. 3 hours doesn’t seem unreasonable for someone who has done it 100 times. You can replace an entire long block in 8 hours if you know what you are doing.

I’m sure a mechanic who has done the job will chime in with a reasonable expectation for the job.
 
How many hours for a mechanic to replace manifolds and risers - 2013 240 Sundeck with a 5.0 MPI. I have received quotes from 3 hours to 8. Which is it?
Did them for the 1st time last Summer, and I'd say it took me about 3 hours or so.
 
I will say this. I paid a pro the $300 labor do it. Why, it’s easy job, just sit next to engine remove a few bolts?
Cause if just ONE, of them bolts breaks off from rust in the block you are so screwed.
 
I will say this. I paid a pro the $300 labor do it. Why, it’s easy job, just sit next to engine remove a few bolts?
Cause if just ONE, of them bolts breaks off from rust in the block you are so screwed.
Whether you or the mechanic does the job, A good run to get the cylinder heads hot will help free up rusted bolts.
 
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Good point. Mine was done over winter on blocks, so no way to run at the location i was stored. So for me, cold weather, it was a easy decision. Different situations.
My winterize guy advised I should replace. And i wanted done before launch so i had him do it. Different situations.
 
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