How many hours is too many on a motor

[Seacrets]

Have a friend that recently got rid of a 150 hp Yamaha. It had 4600+ hrs on it. Original power head.

[cterrebonne]

comp check is a quick easy way to tell if she is gone or not, then if it checks out you run her and then get a leak down. theres really no way to tell if the bearings are good unless you tear the engine down, theres a hole in the side the block, or there is play in the wrist pin bearings.

[phatdaddy]

if you are asking for a rule of thumb, i have always heard on average and outboard lifespan is approximately 1000 hrs, with the average recreational boater using it 100 hrs a season. all of the above are correct though, commercial guys get thousands and thousands of hours and trailer queens much less. like all rule of thumbs, there are many exceptions to this one.

side note: we were chainsaw dealers from 69 to 86 and then the average life of a homeowner chainsaw was 4 to 6 hours.

[lumberslinger178]

Originally Posted by phatdaddy

side note: we were chainsaw dealers from 69 to 86 and then the average life of a homeowner chainsaw was 4 to 6 hours.

Ha ha I believe that.... sounds like me and lawnmowers

[lumberslinger178]

talk about propping heres my motor after about 25 hrs of running the wrong prop.... I repeatedly told the A- hole who sold me the motor that I didnt think it was propped properly ( say that 3 times fast) and he kept saying thats the prop brp recomends...... needless to say he was wrong .....blown powerhead on a brand new motor..... thank god for the warranty.... zero out of pocket expence , only two weeks lose of time ......

[cterrebonne]

lumber what was your max rpm's?

[lumberslinger178]

Originally Posted by cterrebonne

lumber what was your max rpm's?

5600 to 5800

and was only running at the time 4700.

[Hammerhead]

I was told,...and believed'm that my '77 I/O had around 3000 hours on it. It ran fine and was only replaced due to a screw getting sucked down the carb and landing on a piston which blew a hole in the head. Otherwise it'd have about 4000 hours by now.

re;OBs,...I had a 20 year ld "115 "rude that ran strong till it caught fire and burned up,...while still running all the way across biscayne bay.