70 hp Force Break-In Time

[invader]

Is it true you have to run at high idle for 3 hrs to break in new pistons/sleeves etc. for a 95 70hp Force?<br /><br />I just sleeved and bored mine over 20.

 

[clanton]

Re: 70 hp Force Break-In Time

Only if a brand x piston is used and the clearence is to tight.

 

[invader]

Re: 70 hp Force Break-In Time

I put in Wiseco pistons and rings. I don't think it's a tight fit either. How would you break that combo in?<br /><br />Also, I'm putting a sparksensing tach on the engine, not done it yet, but is it easy?

 

[clanton]

Re: 70 hp Force Break-In Time

Instructions should have came with pistons. If dealer rebuild, should have gave you written instructions on breakin. Every machineshop in this area adds more clearence when using Wiseco<br />pistons to prevent sticking doing breakin.

 

[clanton]

Re: 70 hp Force Break-In Time

Instructions should have came with pistons. If dealer rebuild, should have gave you written instructions on breakin. Every machineshop in this area adds more clearence when using Wiseco<br />pistons to prevent sticking doing breakin.

 

[ODDD1]

Re: 70 hp Force Break-In Time

A safe bet for any 2 cycle outboard is:<br />double mix the oil [to 25:1] for 10-12 gallons of fuel<br />While on the double mix,avoid prolonged idle,it will load up with unburned oil an foul plugs...avoid max power [wide open throttle]..short burst to get on plane and such is ok...<br />after you get through the double mix, run it like you stole it....LOL....