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Old 06-20-2017, 12:39 AM   #1
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Default HP of a 5.0

Can anyone help me... Ive been everywhere, even the Honda mercury dealer...

I have a 5.0 litre mcm thunderbolt v ignition alpha, and they tell me it has 260 HP
Im not sure that is true... I think its 220 HP
Doesn't anyone have any idea?

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Old 06-20-2017, 12:39 AM   #2
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Its a 2001/2002 nobody is sure of the year either

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Old 06-20-2017, 03:07 AM   #3
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If fuel injected its 260 HP if carb 220 HP.

Does it really matter? The engine is the engine you have until it's time to repower.
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Old 06-20-2017, 04:15 AM   #4
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Doesnt matter now....
The seller shouldnt of lied about it...
I didnt know better...
Dont get me wrong I love the boat
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Old 06-20-2017, 04:17 AM   #5
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The seller lied thats all...
And I couldn't find a answer from anyone.
I love this boat.
Dont get me wrong
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Old 06-20-2017, 12:41 PM   #6
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Quote:
Originally Posted by Jaslan View Post
The seller lied thats all...
And I couldn't find a answer from anyone.
I love this boat.
Dont get me wrong
Lied or did not know better himself. Glad you love the boat, enjoy.
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Old 06-20-2017, 03:26 PM   #7
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Lied is probably extreme. Tough to prove he knew differently and chose to misrepresent it.

Carb is 220HP. The engine serial number will determine YoM. Call mercruiser and they will do a serial number lookup to narrow it down. Model year engine sold in a later calendar year is not unheard of. (e.g. 2001 engine in a 2003 model vessel, for example).
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Old 06-20-2017, 04:34 PM   #8
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He actually told me this morning after 6 years of owning the boat he wasn't sure.... He didnt know the HP...

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Old 06-20-2017, 04:35 PM   #9
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Serial number must be under the started cause I can't find it... And 2 other mechanics cant either lol

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Old 06-20-2017, 04:36 PM   #10
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Starter I meant

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Old 06-20-2017, 05:00 PM   #11
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Quote:
Originally Posted by Jaslan View Post
Serial number must be under the started cause I can't find it... And 2 other mechanics cant either lol

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I should be on the plastic engine cowl if still there else on side of block near flywheel. In my opinion engine hours are more telling then engine year but then again how well it was cared for is the number one teller for condition.
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Old 06-20-2017, 05:05 PM   #12
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I hear you...
Has 174 hours... Not bad

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Old 06-21-2017, 01:55 AM   #13
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Motor # should be on front of engine on the right side looking from flywheel just in front of the head, flat boss should find # there!
Might be hard to read as it is stamped in then painted!
Don
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Old 06-21-2017, 02:13 AM   #14
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Thank you I will look in front there, this info is very helpful
Thanks

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Old 06-21-2017, 12:28 PM   #15
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Hi guy's good morning
What type of oil would you recommend for
A 5.0 liter v ignition mcm alpha mercury?

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Old 06-21-2017, 12:28 PM   #16
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Its a 305 cod GM thunderbolt

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Old 06-21-2017, 12:29 PM   #17
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Cid sorry

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Old 06-21-2017, 04:54 PM   #18
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Mercruisers or Quicksilvers 25W40 for the engine. High performance lube for the drive.
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Old 06-21-2017, 07:15 PM   #19
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Thank you very much

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Old 06-22-2017, 04:19 AM   #20
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Hi guys...
I had a 21 pitch prop 14.25
Wasn't getting any take off too much... So I got a 19/pitch 14.25.
Great take off, getting 39 mph.
Do I have the right prop?
And is it my top top speed?
Or should I be getting more speed?
I seen post that say I should be getting over 40 mph...
I do trim once planed..
Wondering if I should get another prop... Not sure
Any ideas would be great.

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