Identify Johnson 225HO Powerhead Without Pulling Head?

[225ho]

Hey folks,

I haven't had my HO for about 15yrs. I'm looking at a boat that has a 2000 225HO on it and the owner says the powerhead was replaced in 2009. What I'm trying to remember is I thought there was a way to distinguish a 225ho block by the exhaust hump or water passage or something on the outside of the block. I may be wrong on that. The only other way I know of is to measure the port heights inside the sleeve. I guess I could pull a main jet and look for 76d..?????

My fear is the 2000 HO powerhead was replaced with a regular 3.0....225 powerhead. If that's the case I wouldn't want the motor.

Thanks folks.

[faztbullet]

200 & 225 same powerhead ..only difference is carb size. 225 has raised exhaust port timing and jetting of .072D thru .078D jets

[Instigator]

225 HO has wider (same height) exhaust ports and smaller exhaust bleed holes in the sleeves.

About 110 - 115 lbs compression Vs 95 - 105 for 200/225.

200 - 225 is carbs only.

If the HO has a new powerhead I’d be suspect of the new one.
99% of people replacing/rebuilding the HO have no clue to their differences.
Ive bought several.

A tough verification w/o a stock one to compare with.

If compression is not in the listed range, it’s probably a stocker.

You can see the bleed holes w/a bore scope or by popping a head (which seller will likely not allow you to do).
Stock homes are close to 1/4” OD where the HOs are about half that.

Good luck.

Great motors.

[Muskoka2]

225 HO has wider (same height) exhaust ports and smaller exhaust bleed holes in the sleeves.

About 110 - 115 lbs compression Vs 95 - 105 for 200/225.

200 - 225 is carbs only.

If the HO has a new powerhead I’d be suspect of the new one.
99% of people replacing/rebuilding the HO have no clue to their differences.
Ive bought several.

A tough verification w/o a stock one to compare with.

If compression is not in the listed range, it’s probably a stocker.

You can see the bleed holes w/a bore scope or by popping a head (which seller will likely not allow you to do).
Stock homes are close to 1/4” OD where the HOs are about half that.

Good luck.

Great motors.
Yep-I' ve got a 2000 225 HO I bought in the box for $7,800 CAD after the bankruptcy. Has under 500 hrs.-been problem free/got rid of VRO-does 82 on a Checkmate Pulse 185!

[Instigator]

Great motors!

Under appreciated for sure.

Id like to have a pair on my Convincor.

The one problem w/them was the dealers didn’t know what they had and to educate their buyers.

Dealers didn’t know they had higher compression and to inform owners on needing better fuel.

I proved this after buying a pair from an E-etc dealer in Fla.
I took tools to ck compression but was running late (east coast Fla to west coast and back) so selling dealer agreed to do.

I arrived to see 100 psi written on all 12 holes, knowing they should be 110 - 115.

I stuck a bore light in a hole to verify HO ports, rolled the dice and head east w/them in my truck.

Got hone and w/(a flashlight, motors sill in truck, and checked compression.
115 on all 12!




Yep-I' ve got a 2000 225 HO I bought in the box for $7,800 CAD after the bankruptcy. Has under 500 hrs.-been problem free/got rid of VRO-does 82 on a Checkmate Pulse 185!