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Upgrading a 91 Johnson J50JEIA 50hp to 92 E55RWLENM 55hp carbs. The old 50hp bowls are plugged. The new lower carb has an extra fuel nipple (#22) facing the air box (it clears below). What is this supposed to connect to?
My 91 Johnson 50 two cylinder is running 105PSI in both cylinders. It looks like other Johnson 2 stroke 50s from the 1980s to 2000s on this forum are running as high as 140-150psi.
In the past I’ve increased compression of 2 stroke small engines by replacing rings only, but I’ve never worked...
I have a 91 Johnson 50 with a jet on a 14’ boat. It used to run about 4900 RPM at WOT and was smooth the whole way from idle.
A few days ago we were running and on one launch it capped out at 4600 RPM. It would run smooth to 4500 RPM and as soon as pushed the throttle just a tad further to WOT...
I have a 91 Johnson 50/35 on a 14’ river runner. It takes longer to get on a plane than I would like. At WOT it runs 5000 rpm whether accelerating or on a full plane. The throttle stop is set so the intake is wide open. I think the holeshot would be faster if I could get rpm’s up to 5300-5500...
I have a 91 Johnson J50JEIA with model AF jet. The jet has a non-flanged liner. Ordered a new liner from outboard jets and I can’t get it to seat far enough to insert bolts no matter how hard I hit with a mallet. It’s 1/16” to 1/8” off. The hole seems to be in a slightly different spot too...