Sorting out a Frankenstein'd 2.4/200

[pcrussell50]

Decided to make a dedicated thread so I'm not stepping all over and trashing up other people's threads with my questions...


So I bought a 2.4/200 powerhead that is a late November 1990 (non-clamshell) block, dressed in what I think is about 1983 carbs, reed block, and electrics, and fitted with the clamshells. That's why the Frankenstein moniker.

I think I have this mostly sorted out (in my head), but I have not dropped it onto my existing mid-80's mid yet. Run out of time now that our little girls are back in school. So planning for the next few times I can get back out to the lake house.

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Re regulators and rectifiers, this post in one of the threads I bombed my way into talks about it: https://www.screamandfly.com/showthr...01#post3356101

So on the 2.4/200 this is area behind the flywheel, between the heads where a regulator or rectifier is supposed to go, but there is nothing:


But I have a 1986 2.0/150 that looks like this:


And 1986 2.0/150 XR2 that looks almost the same:


===

Meantime, as per the first photo on top, this Frankenstein 2.4/200 has nothing here. Stupid newb question... Is this OK? I'm pretty sure it doesn't have the 40A water cooled regulator on the back of the exhaust cover because what's there now is the "spine" of the clamshell, with the six coils stacked top to bottom, like so:


Better view of the electrics/wiring side:


Thanks for looking/commenting.

-Peter

[RoyE]

The part on top of the block in your two pictures of other motors is a voltage regulator. A lot of people run the 16A system with only a rectifier and no voltage regulator, but you have to use a wet cell battery.

The rectifier is located on the plate on the side of the block, circled in the picture below.


So to answer your question, yes it is OK and you can run it like that, but I would double check that you have a 16A flywheel and stator.

Personally I would replace the (very old) rectifier with a modern 20A regulator/rectifier.

[pcrussell50]

Thanks mate. Much appreciated. I will double
check but I bet it’s a 16A flywheel since it looks like it was a 1983 retrofitted to the late 1990 block. A proper modern rectifier/regulator is on my list for when I get the rest sorted out. I run only regular wet cell lead-acid batteries.

Say, can you (or anyone) post up a page of a mid-80’s electrical
system? I’m away from my boats and manuals, on my way back to Australia for high school reunion and about to be shut in for 15 hours.

===

I’ve got a couple more questions not related to electrics as well.

-Peter

[idvette]

Replace that starter ground wire!

[pcrussell50]

How Merc handled poppets through the 1980’s is confusing…

Late 1990 2.4/200 block and heads with 1983 dressing…

This motor is one that has that the poppet valve on the side, down by the spacers…

I will be dropping it onto a 1987 mid that had an 2.0/XR2 on it with no poppet valve*. The “new” power head has a poppet. Other than getting a 1989-1991 exhaust plate, is there anything else I need to be concerned with here in the way of water flow/cooling management?

*I also have a 1987 2.0/V150 they has the poppet, but with the small end broken off (by the previous owner). I got this motor for essentially free, with a melted piston.

Why some 1980’s 2.0/2.4’s had poppets and others didn’t? :shrugs:

-Peter

[tlwjkw]

every production (1976 up) 2.0, 2.4, 2.5 made has a poppet....... also tha one that "looks" broken off could possibly be from factory.. some looked like that.. some looked like they were cut with a hack saw.. was a quick way tha make a 2 hole from a 4 hole.

[pcrussell50]

every production (1976 up) 2.0, 2.4, 2.5 made has a poppet....... also tha one that "looks" broken off could possibly be from factory.. some looked like that.. some looked like they were cut with a hack saw.. was a quick way tha make a 2 hole from a 4 hole.

ON EDIT: agree. Mine are all like that. I have deleted the confusing commentary and pictures. Sorry all.

-Peter

[tlwjkw]

sorry, but i don't care how many pictures ya take, tha poppet is in tha same place on every one of 'em.. there are three different designs.. 2 of 'em are 4 hole and one is a 2 hole... only one of tha 4 hole designs had a hose bib on it.. tha other 2 do not...

[pcrussell50]

sorry, but i don't care how many pictures ya take, tha poppet is in tha same place on every one of 'em.. there are three different designs.. 2 of 'em are 4 hole and one is a 2 hole... only one of tha 4 hole designs had a hose bib on it.. tha other 2 do not...

I never meant to say you’re wrong. Just that up until now, it was thoroughly confusing. Your description has helped. When I get back to my motors the day after tomorrow I’ll take a closer look at the ones without the hose bib.

Thanks as always.

-Peter

[tlwjkw]

jus sayin', i've bought, built, owned (no way ta count how many) 2.0/2.4/2.5's production and high performance motors since 1976 and everyone of 'em has a poppet and/or a castin' (high performance) for one in tha same place............ get all tha junk outta tha way and you will see.........jmo.

tha hose bib came on later years when they came out with a water cooled reg/rectifier..('89 i think).. some that had tha design II added a bib and hose to tha top of tha block because they found it aided tha coolin' system by helpin' get rid of air pockets.. tha water cooled junk would still burn up!........... jmo

[pcrussell50]

jus sayin', i've bought, built, owned (no way ta count how many) 2.0/2.4/2.5's production and high performance motors since 1976 and everyone of 'em has a poppet and/or a castin' (high performance) for one in tha same place............ get all tha junk outta tha way and you will see.........jmo.

tha hose bib came on later years when they came out with a water cooled reg/rectifier..('89 i think).. some that had tha design II added a bib and hose to tha top of tha block because they found it aided tha coolin' system by helpin' get rid of air pockets.. tha water cooled junk would still burn up!........... jmo

solid gold right there. The previous owner of mine had already ditched the water cooled regulator, but kept the bib with the hose to the top. It’s all old skool 16A system… not even a regulator. Just the rectifier.

-Peter

[pcrussell50]

jus sayin', i've bought, built, owned (no way ta count how many) 2.0/2.4/2.5's production and high performance motors since 1976 and everyone of 'em has a poppet and/or a castin' (high performance) for one in tha same place............ get all tha junk outta tha way and you will see.........jmo.

Looks like I owe you an apology, mate. You are dead right. I just got home to check, and My XR2/2.0 most certainly DOES have the same poppet circle as my v150/2.0, and of course the late 1990 2.4 has the dog bone one with a hose bib on the smaller end. So all of my 80's-90 v6's have the same (more or less) poppet scheme exactly as you said.

Sorry for any confusion to other readers. I will edit my post so nobody is thrown off by it.

-Peter

[rgsauger]

Accept your public caning like a man!

[pcrussell50]

So fitting this November 1990 block onto a mid-80’s mid.

If I am reading the parts diagrams right, the “exhaust plate” that goes immediately below the block is the same from 1977 through 1990. But the plate that goes below that one is 1989-1990 specific, suggesting that something changed in the midsection of those years. Does that sound right?

-Peter

[pcrussell50]

So, this is a November 1990 2.4 block, on a 1983/200hp mid (6357060).

Curious about it's HP since it's a 1983 and could be either side of the prop or crank rating.

It has horizontal reeds---Like a prop rated 200
It has the 200 air box/choke plate---Like a prop rated 200
The gear box/LU is 1.86 (not 2.0)
BUT
The carbs are WH-22's which I can hardly find anything about. Can't find WH-22's as one of the choices for the 1983 2.4/200 on marineengine.com. Can't find where WH-22's appeared on any engine for that matter. Sometimes they are listed as 1983/200's sometimes 175's in eBay listings.

So the confuser seems to be the WH-22 carbs. Could these carbs be making what otherwise might be a prop rated 200, into a prop rate 175?

Couple of pics if it helps:

port side (square fuel pump on November 1990 2.4 block)


starboard side


WH-22


-Peter