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Wisco pistons 1997 200 hp

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profisher

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"I've rebuilt a 1997 Saltwater 200 as a spare engine. Parts are to commonly now becoming back ordered to not have a fully ready running spare. I bored it 20 over, new Wisco's with pins and rings, new big end and small end bearings and all new reed peddles. Cleaned all connectors in all the wiring, replacing those to corroded to clean up and dissembled and cleaned carbs. I won't run this engine until I need it so it will sit around for awhile (maybe 3 to 5 years hopefully)..2 questions...anything that others have done to prevent any internal corrosion? ... and I know you have to be more careful breaking in a forged piston...what should I do differently over the break-ins I've done on new Yami's with stock pistons? I now have 2 running engines (1 as a spare) and a 99% complete 3rd torn down as a parts engine. (missing 2 carbs and the reeds)"
 
"Rollie, I've used Wisco&#

"Rollie, I've used Wisco's in motorcycles for years. Makes sense they would perform well in an OB. Assuming you have the OX66 series. In a water cooled 2-stroke I would run the oil rich, idle to operating temp and shut down 2-3 times. First 2-3 hours keep RPM under 3500 varying the throttle. Next 2-3 hours keep under 4000 and vary the throttle; with bringing up to full throttle for 30-seconds. I think most builders use stock pistons so it will be interesting to hear from the pros. I believe the forged pistons will make the engine run a little hotter. How hard was it removing the PH? I hear it could go either way depending on the condition of the mounting bolts. Do you premix your fuel? These engines seem to last longer when premixed. It would be interesting to see how this engine performs against the 200 4-stroke."
 
"ucker...sound exactly the sam

"ucker...sound exactly the same as stock for break in. Not an OX66, 1997 carbed, would never buy an EFI 2 stroke, seen to many problems. This rebuild was to a spare powerhead that was not mounted on a leg. It is going onto a leg to make a complete spare engine, instead of a spare powerhead. The 3rd engine was a complete teardown. PH was easy..1/2 hr, just the lower cowling bolts, then powerhead bolts, shift arm mount, and a few odds and ends. Took a bit of force to get it to pop free once everything was disconnected. Luckily I bought it from the dealer and they pulled it free with a forklift for me so I could take it home in the my truck in 2 pieces. As far as performance, the 2 strokes have more top end and a better hole shot. I think this engine will be a bit noisier until warmed up over stock. I think it will sound a bit like an OMC 2stroke which come with forged pistons. Way more piston slap when cold until the pistons expand and fill in the larger clearance in the bores."
 
"Rollie,
Sounds like you got

"Rollie,
Sounds like you got everything put together. There is a shop that hot-rods Yamaha's and sells an aftermarket exhaust manifold that really seems to open things up. I think it's around $200 and I bet it would make that motor scream. A lot of guys in the south use Salt Away for corrosion. They claim that it also prevents corrosion after you use it. I remember a pair of those Ocean Pros in my marina. Noisy as hell in the morning but sounded kind of cool. Smoked like crazy, but I like the smell of a 2-stroke. After the guy blew one up because that POS oil pump failed, they became known as Ocean Blows. I hardly ever see big OMC motors anymore, a real shame. Was it expensive to get the block bored? How did they do it? Do they chuck it in a Bridgeport?"
 
"Not sure how the boring was d

"Not sure how the boring was done, it was shipped over to Vancouver to a company called Mongoose Machine & Engineering. (www.mongoosemachine.com) Cost I believe was $35 per hole. I have never seen or heard of a Yami oil pump failure. I have over 3000 hrs on my pumps, no problems. My engine is very quiet, in fact many customers ask how old the engine is, then when they here it is a 97 say its done well and its really quiet. I then tell them its a 2 stroke, they thought it was a 4 stroke. I'm not into aftermarket mods, this is a charter vessel, and reliabilty and longevity are what matters most to me. I run my engine at 4200 RPMS = 29MPH = 10 GPH. If I run it harder it will bightme in my pocket book...I see it happen to all the other younger guys who think running 5400 on a 5600 red line is taking it easy!!! lol"
 
wiesco piston just need a bigg

wiesco piston just need a bigger clearance

and as long as you warm the motors up also

they have more silica in their metals
 
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