470 Questions

[randlemanboater]

Originally Posted by C YENSEN

your gonna blow somethin.

Naw, its just icecream.

[spareparts]

there have been a couple of good points made, you have to excuse my enthusiasm for more power. Before you do anything, check the compresion of the engine, make sure you're not wasting money and time on a sick motor. the next thing is to inspect the exhasut riser and gasket, they are notorious for giving probelms, if you are going to swap manifolds, the exhaust would need it more than the intake. If you are happy with the performace of the engine/boat then only fix what is broken, if you feel the need for more power ,then consider swaping out the manifolds and carbs. If it ain't broke don't fix it, but if its slow chrome it

[rb437]

Originally Posted by randlemanboater

Naw, its just icecream.

For those who missed the joke.............

http://www.youtube.com/watch?v=2OpuuAa7gdE

[cfelton]

I've gotta 170 (470) also. Im with CY, if its running good, stay outta the hood! Changing the intake and exhaust would put undo pressure on the engine. For me I wouldnt change it. Maybe rebuild that 190 and keep for later use.

[C YENSEN]

Originally Posted by cfelton

I've gotta 170 (470) also. Im with CY, if its running good, stay outta the hood! Changing the intake and exhaust would put undo pressure on the engine. For me I wouldnt change it. Maybe rebuild that 190 and keep for later use.

you got the original motor? any changes or major repairs? mine leaks oil like a champ, does yours?

[cfelton]

Hey CY, this engine is the one that was in it when I bought it, not original to the boat. Its an 85-86 model 170. It had been rebuilt by Jasper but sat up about 5 years. I went through it again with new pistons, rings, brgs,head, riser ,ignition and I rebuilt the carburator. Runs great now!

[C YENSEN]

Originally Posted by cfelton

Hey CY, this engine is the one that was in it when I bought it, not original to the boat. Its an 85-86 model 170. It had been rebuilt by Jasper but sat up about 5 years. I went through it again with new pistons, rings, brgs,head, riser ,ignition and I rebuilt the carburator. Runs great now!

DAM, YOU DID ALL THAT AFTER IT WAS REBUILT

[cfelton]

Yep, the head had rusted out on the exhaust ports. So while I had it out and apart, I went through the bottom end and freshened it up a little. A couple of pistons had rust particals embedded in the tops. It had been bored .040 over. I honed the cylinders really lightly and put it back together. Everything looked good.