1980 2.4 225 modifications?

**spongebob440** · 01-02-2017, 05:39 PM

hello everyone
i have a 1980 2.4 225 merc
i am looking to get some more out of it
i want to modify it without going over the too. i am running it on a 1980 hydrostream vector all recored and solid transom. i am using a 1.87 gearcase woth land and sea lwp
thank you all for any advice
-Bob

**transomstand** · 01-02-2017, 05:44 PM

Get a nicer trailer.

**outasite** · 01-02-2017, 06:36 PM

Check the carbs,make sure it still has the WH15,cut the heads for 145psi cut the tuner back to 6 1/2" on the long side. If none of this helps,then go trailer shopping

**3rd Gen** · 01-02-2017, 07:42 PM

Trailers are Cheap Go for it Bob !! outasite whats the spec for the 145 psi on the heads ? And Happy New you to you and Pete !

Originally Posted by outasite

Check the carbs,make sure it still has the WH15,cut the heads for 145psi cut the tuner back to 6 1/2" on the long side. If none of this helps,then go trailer shopping

**3rd Gen** · 01-02-2017, 07:45 PM

Look at your picture on your post the boats riding on its side that will slow you down for sure !! L O L

**outasite** · 01-02-2017, 08:37 PM

Well if ya got an 80 PH it's a gen 1.that makes it a HEMI!!! From what I remember 31cc to start,some went to 29cc and more.The 2.4 off shores of 78/9 vintage were cut .100 @ factory and would yield around 145psi and called for avfuel

**outasite** · 01-02-2017, 09:24 PM

Or you could put a pair of first gen 2L heads on it.

**transomstand** · 01-02-2017, 09:51 PM

OR......buy a bigger paddle

**coffeeguy** · 01-03-2017, 05:40 AM

Carson reeds really cleaned up idling.

**ChrisCarsonMarine** · 01-03-2017, 08:12 AM

Originally Posted by outasite

Or you could put a pair of first gen 2L heads on it.

Wont fit,different bolt pattern,Chris

**tlwjkw** · 01-03-2017, 08:13 AM

when dealin' with 1st gen heads/block be very careful... they (bolt bosses, threads) don't like a bunch a on and off stuff... make sure both surfaces are "flat"....

even with tha added comp ya not gonna see much.... i ran those for several years back in tha day at 140/145 22 degrees with 91/93 with no problems.....

came with 5's and 20's also.... 20's are good...

**spongebob440** · 01-05-2017, 06:19 AM

Originally Posted by outasite

Well if ya got an 80 PH it's a gen 1.that makes it a HEMI!!! From what I remember 31cc to start,some went to 29cc and more.The 2.4 off shores of 78/9 vintage were cut .100 @ factory and would yield around 145psi and called for avfuel

the serial number is 5929399 if this helps figure out exactpy what it is
thank you Bob!

**tlwjkw** · 01-05-2017, 06:46 AM

'80/'81 225, first gen.

**outasite** · 01-05-2017, 07:51 AM

Those were the first of the horizontal seven petal reed motors.They were strong for the time.The down side was the head bolts pulling on the cylinder bores.If the heads got pulled a few times the bores would get pulled out of round,and the threads tended to strip out.The 2L 1750 with the steel liners diden't seem to suffer as bad.I was thinking that all gen 1 head bolt patterns were the same,2.4 and 2.0 but its been 35 years. Get her runnin and bring it to the romp!!

**spongebob440** · 01-05-2017, 09:29 PM

she runs like a beast!! seen 83mph on the vector with just my dad driving in the bay. Doing solid mounts and new base gaskets and she will be at the romp!! Hopefully along with my vector (stringer comp layup)bwhen it gets done. HOPEFULLY!!!! i needa get back to rippin core out again. ive been slacking lol
-Josh