motors age

[beradtke]

you say v200 are the 150/175/200 all the same persay or are there lil things different.

chrome bore that means it can never be rebuilt(bored over)?

oil mix 50:1 thats what i was told to run by my father(dad always like the jonrudes thought)

[Blue197320]

i run 50:1 in my 84 merc. so far its been happy

[Bigshrimpin]

1982 and earlier 150 were 2.0L with thick steel sleeves.
1982 and earlier 175's were also 2.0L with hogged out open exhaust and big carbs wh-1's. Early 2.0L's were all vertical reed motors.

V200 and V225 were 2.4L blocks with chrome plated cylinders. Block looks almost identical to the 2.0L from the outside (except V225), but the porting and cylinder walls are different 2.0L vs. 2.4L.

The V200 had vertical reed front half and smaller carbs.

V225 had the largest carbs merc made (wh-15's and wh-20's) and had the wide 14 Petal reed horizontal front half for sucking maximum air/fuel.

I would not get caught up in the idea you will ever have to have to rebuild the block if you lose a ring and scratch the chrome. The motor made it this far . . . and the ones I've pulled apart that failed were alway due to owner neglect (bad water pump impeller, crusty poppet, stuck t-stats, rotten wiring, advance module, gasket material inside carb bowls, corrosion => no zincs ). It's really hard to kill the 2.4L motors if they are cared for properly.

Chrome is much harder than steel. It also allows much much better heat transfer and it's porous, so it lubes the rings better too. If you did blow it up . . . You can always get another block or an entire motor for $500 - $1200, so there is no reason to worry about rebuilding.

It's hard to justify buying a new motor when you can buy 10+ 2.4L motors for the same price. My V200 with the wh-11 carbs averaged 3.6 mpg my last trip (101 miles) pushing the seafari 27 - 30mph in 1-2ft seas, so I cannot complain.

[beradtke]

hey big thanks for the info. My lower unit has the plastic pick up to it,looks like all original. now in you pic your coweling is red. mine is blue. i have only seen them in red. is the blue coweling just a oddity.

thanks blue for the back up on the 50 to one. which brand oil are you running . i was given quicksilver by a fiends dad said,he used in in his merc?

[Bigshrimpin]

This was the original cowling from 1979 v200. When I parted out a newer 175 XRi I saved the cowling for myself.

[beradtke]

thats the cowling i have(just says 175 instead)

[Blue197320]

i just run regular tcw3 in it. im finishing some west marine brand oil i got on sale then after that i got some penzoil to burn up.

[Bigshrimpin]

I'm not sure why I thought you had a 200? is your motor a 175?
If so those are steel sleeve motors and the lower unit will have a 2:1 gear ratio.

[beradtke]

yes mine is a 175hp. S o it is just a 150hp thats bored out to make 175 hp. With the 2:1 lower unit do they still interchange with all the other mercs?

[Bigshrimpin]

175 is still the same displacement (bore and stroke is still 2.0L) . . . it just has different carbs, reed stops and an open exhaust.