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I never was able to pinpoint exactly where/when the reverse polarity incident happened. I was however able to diagnose it as a damaged rectifier/regulator without doing that stator wire swap with the marked wires. A bench test was sufficient to diagnose it after a potential regulator/rectifier...

I have a 1990 90hp V4 crossflow that I recently finished rebuilding and have been ironing out the minor bugs identified. (1 hour or less of run time, under break in procedure being gentle checking things out on the hose) I noticed that the tachometer failed to register after I finished checking...

Several reasons: 1. Top crankcase cover/crankshaft bearing and the crankshaft surface for that bearing looked and moved excellent with plenty of oil, no excessive wear marks, no noise, no slop, and no corrosion. Looked almost textbook perfect for a used motor when I pulled the cover off the top...

No, I did not. I do not believe it was listed in the items to replace (must replace) when I asked here previously about a checklist of things not mentioned in the factory manual for putting the powerhead together. This motor was running when taken apart for the purpose of resolving stuck...

I've finally was able to get all connecting rod caps properly aligned and 100% torqued to factory spec, the crankshaft moves with no binding or weird anomalies that I could see/feel. The delay was mostly because I got overly concerned about not doing anything to put a mild port edge chamfer...

I'm having an issue with just ONE connecting rod cap inlet, the clearance hole when the bolt is put only finger tight won't allow my 12 point socket in without pushing the rod cap at that end out of alignment. Which then I can barely feel a crack/line. All other holes on the connecting rod...

Back when I was checking the old/original two stroke piston rings for the gap in the cylinder after the block was checked to be in spec by machine shop and they de-glazed it with cross hatching, the OEM ones had a very small surface area to measure end gap. That was a problem because it made...

Two specifc questions: Question #1 What technique is best recommended for installing the Wiseco piston circlips when putting the final clip in? When practicing on the old OEM piston, I can consistently use the plastic handle flat square screwdriver and push the end part of the clip into the...

I got my parts in to begin slowly the powerhead rebuild of the V4 crossflow motor. I just finished my check on the end ring gap for the smallest and largest measured bore to verify it was within spec of the Wiseco pistons for just one piston. I'll still check the rest before putting them on the...

I've seen photos and videos showing the usual pattern for Gel seal application. However, I'm curious on exactly the proper placement for the typical 1990 V4 crossflow motor. Here is the photo of what I know and the possible placement drawn out in red lines via MS paint. Getting questions...

This is asking for professional viewpoint on wear limits/tolerances based on the published ring gap maximum for the piston rings of a 1990 V4 90hp Johnson. Data: All cylinders were checked by machine shop to be within specifications for standard bore size per the OEM manual I gave them to...

How much in volume is a good safe amount for Loctite 518 sealant needed for about 2 full attempts to seal the crankcase of a V4 crossflow? A 50ml tube sufficient? Just to make sure, primer is not necessary correct?

After a lot going on last year, I was able recently to get my cylinders checked at a machine shop and de-glazed for a VJ90TLASB. I have to pick it up tommorow but I was told they were all in spec per the factory manual details. So my question is what do I need to replace other than seals...

I'm trying to decide how best to approach getting a crankcase cover pin out of the V4 crossflow motor (1990). The first one was significantly above the surface and a socket extension head on it knocked it out properly in the direction the OEM service manual tells you. The second pin at the top...

I am on the last part of the electrical/ignition teardown of the powerhead of 1990 V4 90 HP crossflow outboard, which is trying to get the rectifier/regulator freed of the gasket on the powerhead. Everything else has been removed involving the flywheel, charge coil, timer base, power pack, etc...

I'm in the flywheel removal stage of attempting to disassemble my 1990 OMC V4 90 hp crossflow powerhead on my workbench area. The problem is as soon as I start getting enough torque to possibly loosen the flywheel nut, the far end tooth of the flywheel turner (Lisle) slips out. Is there any...

I'm planning for powerhead teardown in a month or so. What is the preferred hard container method that is cheap for keeping powerhead teardown parts organized. This includes all the fragile parts as well. I'm already using zip bags with sharpie notes on the small stuff. Volume isn't as big...

What is the correct part number for the lift fixture on a V4 crossflow (1979 and up) using the crankshaft threads and flywheel? I thought there was a combo package from BRP that included flywheel puller and lift ring. So far all I see is them as seperate items and don't see any...

Would a 1988 110 HP engine block be an exact replacement for 1990 V4 crossflow block? Someone very recently is selling a machined block (3 holes 0.02, 1 hole required 0.04 oversize) for $150 within reasonable driving distance. I would be more inclined to buy it except the 0.04 hole. Would it...

I need to determine what precision level tolerance and quality of manufacturers is needed for a dial bore gauge to determine clyinder in spec or out of spec diameter or out of round. I want to avoid buying multiple times but also don't want to spend twice as much than needed. I bring this up...