Crankshaft tolerances?

[Littlepudge14]

Hi all,

i have a 3 cyl 75hp Johnson
model: J75TLCNB

I’m wondering what the crankshaft tolerances are for the crankshaft journal where the connecting rod sits. Also can you order bigger sized roller bearings somewhere for the connecting rod to crankshaft?

 

[racerone]

This is precision stuff.----And no the factory does not offer larger rollers and the cages that would have to go along with them

 

[fdrgator]

Never saw a rod journal worn undersize that wasn't also otherwise damaged. They must look perfect, and probably are if so. Any defect at all, then well.......

 

[PhilSch]

Hi all,

i have a 3 cyl 75hp Johnson
model: J75TLCNB

I’m wondering what the crankshaft tolerances are for the crankshaft journal where the connecting rod sits. Also can you order bigger sized roller bearings somewhere for the connecting rod to crankshaft?

Minimum journal sizes are listed in the factory manual. If you need the numbers let me know and I'll look it up for you.